Cohort validation pack

DASH

Determinants of Adolescent Social Wellbeing & Health

Generated 6 Oct 2026, 10:35 · ID 73

Unverified

Last verified: 13/08/2026

Instructions for reviewers

Review each field against your knowledge of this cohort. Mark Accurate if the value is right, Needs correction if it is wrong or inaccurate (add notes), Not sure if you cannot verify it, or Does not apply if the field is not relevant.
Evidence shown is from our source registry. Fields marked No source yet hold values we could not yet pin to a document — those were AI-inferred and need your input most. Fields marked Searched — not published are ones we looked for and could not find publicly; the note lists where we checked.
Your selections and notes are kept in this browser tab only (not sent to the database). Print or save as PDF when finished, then return it to the DIGIT team.

Overview

102

Total fields

Field-cited

Whole-record source only

AI-inferred, no source yet

Searched — not published

No value held

Needs review

Source coverage

Summary of how well fields in this pack are linked to evidence.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Field-level source coverage Optional	85 of 97 reviewable fields are cited to a source (88%) · 0 with no source yet · 12 searched — not published · 12 with no value held	Computed	No citation linked to this field yet.	Response for Field-level source coverageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Identity and ownership

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Short name Required	DASH	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: identificationModule.acronym “DASH” Page: https://clinicaltrials.gov/study/NCT03283332 King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Page heading “DASH - Determinants of Adolescent Social Wellbeing & Health” Page: https://www.kcl.ac.uk/research/dash-2	Response for Short nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Full name Required	Determinants of Adolescent Social Wellbeing & Health	Field-cited	Harding S, Whitrow M, Maynard MJ, Teyhan A. Cohort profile: The DASH (Determinants of Adolescent Social well-being and Health) Study, an ethnically diverse cohort. Int J Epidemiol. 2007;36(3):512-517. https://doi.org/10.1093/ije/dym094 Section: Cohort profile title metadata “Cohort profile: The DASH (Determinants of Adolescent Social well-being and Health) Study, an ethnically diverse cohort.” Page: https://doi.org/10.1093/ije/dym094 Original 2007 cohort profile styling of the same expansion. Paper is not open access, so only title and DOI metadata are cited. King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Aims “The Determinants of Adolescent Social Wellbeing & Health (DASH)” Page: https://www.kcl.ac.uk/research/dash-2 CORRECTED 2026-08-05 from the 2007 paper styling to the expansion used by the current host institution. The same wording appears on the Catalogue of Mental Health Measures and the HDR UK Gateway record. The 2015 review title instead reads Determinants of young Adult Social well-being and Health, reflecting the cohort ageing into adulthood; that variant is recorded in cohort notes.	Response for Full nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Managing organisation Recommended	King's College London / MRC-CSO Social and Public Health Sciences Unit, University of Glasgow	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: sponsorCollaboratorsModule “King's College London” Page: https://clinicaltrials.gov/study/NCT03283332 leadSponsor is King's College London; collaborators are the Medical Research Council and the Chief Scientist Office of the Scottish Government. Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Overview — Institution “MRC Social & Public Health Sciences Unit, University of Glasgow & King's College London” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Confirms the joint Glasgow SPHSU / KCL custodianship recorded in managing_organisation.	Response for Managing organisationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Primary site Recommended	Institute of Psychiatry, Psychology & Neuroscience (site #13)	Field-cited	King's College London staff profile — Professor Seeromanie Harding https://www.kcl.ac.uk/people/seeromanie-harding Section: Staff profile — department “Department of Population Health Sciences” Page: https://www.kcl.ac.uk/people/seeromanie-harding primary_site_id=13 maps to the IoPPN row and is used as this database's King's College London anchor (same convention as TwinsUK). NOTE: DASH is a KCL study but sits in the Department of Population Health Sciences, NOT the IoPPN, per the PI staff profile. The 2015 paper prints the affiliation only as Kings College London, with no institute. Recorded in cohort notes; a dedicated KCL population-health site row would be more precise.	Response for Primary siteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Website URL Recommended	https://www.kcl.ac.uk/research/dash-2	Field-cited	King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Project page “The DASH study was designed to systematically examine the influence of social conditions (particularly aspects of family life, school life and neighbourhoods) on health and well-being of ethnic minority young people.” Page: https://www.kcl.ac.uk/research/dash-2 CORRECTED 2026-08-05 from https://eprints.gla.ac.uk/353350/ to the live KCL project page. The eprints record is a metadata stub carrying no study content, and the archive it points to sits on Conifer, a platform discontinued in June 2026. The KCL page is live, names the PI and contact address, and states the project status. Legacy DASH website root — retirement notice pointing to the Glasgow Enlighten archive http://dash.sphsu.mrc.ac.uk/ Section: Retirement notice body “The website for DASH is no longer live.” Page: http://dash.sphsu.mrc.ac.uk/ Confirms the legacy project domain no longer hosts study content, so it cannot serve as website_url.	Response for Website URLAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Catalogue of Mental Health Measures URL Recommended	https://www.cataloguementalhealth.ac.uk/DASH	Field-cited	Catalogue of Mental Health Measures https://www.cataloguementalhealth.ac.uk Section: Official sitemap study URL “https://www.cataloguementalhealth.ac.uk/DASH” Page: https://www.cataloguementalhealth.ac.uk/DASH Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Catalogue study record “Determinants of Adolescent Social Wellbeing & Health (DASH)” Page: https://www.cataloguementalhealth.ac.uk/DASH Exact cohort match: the Catalogue of Mental Health Measures hosts a dedicated DASH study record. The stored value is https://www.cataloguementalhealth.ac.uk/DASH, set by db/seed/cohorts/999_catalogue-of-mental-health-measures-links.sql from the official catalogue sitemap; both that short form and the ?content=study&studyid=DASH query form resolve (HTTP 200) to the same record. NOTE the catalogue's own mental health measures timeline is currently empty for DASH — the record carries sample, linkage and data-access fields but lists no instruments, so it does not corroborate mental_health_measures.	Response for Catalogue of Mental Health Measures URLAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Contact name Recommended	Professor Seeromanie Harding	Field-cited	King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Principal Investigator “Professor of Social Epidemiology” Page: https://www.kcl.ac.uk/research/dash-2 FILLED 2026-08-05 (was NULL). The KCL project page names Professor Seeromanie Harding as Principal Investigator. Corroborated by ClinicalTrials.gov overallOfficials, which lists Seeromanie Harding, PhD, King's College London, as PRINCIPAL_INVESTIGATOR.	Response for Contact nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Contact email Recommended	seeromanie.harding@kcl.ac.uk	Field-cited	King's College London staff profile — Professor Seeromanie Harding https://www.kcl.ac.uk/people/seeromanie-harding Section: Staff profile “seeromanie.harding@kcl.ac.uk” Page: https://www.kcl.ac.uk/people/seeromanie-harding Independent confirmation of the same address on the PI staff profile. King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Contact us “seeromanie.harding@kcl.ac.uk” Page: https://www.kcl.ac.uk/research/dash-2 FILLED 2026-08-05 (was NULL). Published by the host institution under a Contact us heading on the project page, so it is a public study contact rather than an address scraped from correspondence metadata.	Response for Contact emailAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Summary and status

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Description Required	Multi-ethnic school-based cohort of 6,643 pupils recruited in 2002/2003 at ages 11-13 from 51 secondary schools across 10 inner London boroughs (Brent, Croydon, Hackney, Hammersmith & Fulham, Haringey, Lambeth, Newham, Southwark, Waltham Forest and Wandsworth), designed to examine how social conditions — family life, school life and neighbourhoods — shape ethnic differences in mental health, cardiovascular and respiratory health. Around 80% of participants are from ethnic minority groups, sampled to give substantial numbers of Black Caribbean, Black African, Indian and Pakistani/Bangladeshi young people. Follow-up ran in 2005/2006 at ages 14-16 (4,785 participants, 72% of the baseline cohort), a postal, telephone and online sweep in 2010/2011 at ages 19-21, and a 10% feasibility sub-sample of 665 at ages 21-23 completed in March 2014 which added blood biomarkers, accelerometry and qualitative interviews. Mental health is measured by the self-report Strengths and Difficulties Questionnaire across adolescence and the GHQ-12 in early adulthood.	Field-cited	HDR UK Innovation Gateway DASH dataset record (publisher DATAMIND), mirrored via find.data.gov.scot dataset 26270 https://find.data.gov.scot/datasets/26270 Section: Gateway dataset description “DASH is a multi-ethnic adolescent cohort study which investigates how social, environmental and biological factors affect the health and well-being of young people from different social and ethnic backgrounds in London.” Page: https://find.data.gov.scot/datasets/26270 Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19. https://doi.org/10.1186/s12966-019-0780-y Section: Methods — Design and sample “the London boroughs of Brent, Croydon, Hackney, Hammersmith & Fulham, Haringey, Lambeth, Newham, Southwark, Waltham Forest and Wandsworth” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/ Supplies the named 10 boroughs listed in the description. King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Overview “The DASH study was designed to systematically examine the influence of social conditions (particularly aspects of family life, school life and neighbourhoods) on health and well-being of ethnic minority young people.” Page: https://www.kcl.ac.uk/research/dash-2	Response for DescriptionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N Required	6,643	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Design and methods — Study sample “The sample was recruited between 2002 and 2003, from 51 schools in 10 London boroughs.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Same paragraph states a total of 6643 students aged 11-13 took part in the baseline survey. ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: designModule.enrollmentInfo “6643” Page: https://clinicaltrials.gov/study/NCT03283332 Registry records enrollment count 6643 with type ACTUAL. Independently matched by the 2015 review, the 2016 BMJ Open paper and the Catalogue of Mental Health Measures (sample size at recruitment 6,643). CONFIRMED.	Response for Total NAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N qualifier Recommended	baseline_participants	Field-cited	Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Sample “Sample size at recruitment” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH total_n is anchored to the 2002/2003 baseline recruitment enumeration, hence qualifier baseline_participants. Note this value is outside the four qualifiers formally enumerated in docs/data-dictionary.md; it is retained because 6,643 is an exact recruitment count rather than an approximation, and the same qualifier is already used elsewhere in the database.	Response for Total N qualifierAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Year established Recommended	2002	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Design and methods — Study sample “The sample was recruited between 2002 and 2003, from 51 schools in 10 London boroughs.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ year_established = 2002, the opening year of the 2002/2003 baseline recruitment window.	Response for Year establishedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Active cohort Recommended	Yes	Field-cited	King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Project status “Project status: Ongoing” Page: https://www.kcl.ac.uk/research/dash-2 The host institution lists DASH as an ongoing project, so the resource is treated as maintained (is_active = TRUE), distinct from ongoing_recruitment which is FALSE. Note no new data collection has been published since the wave completed in March 2014.	Response for Active cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ongoing recruitment Recommended	No	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: statusModule.overallStatus “COMPLETED” Page: https://clinicaltrials.gov/study/NCT03283332 FALSE. The registered study is COMPLETED, and DASH is a closed school-based cohort enumerated at baseline in 2002/2003 with no open recruitment pathway. Distinct from is_active, which is TRUE because the resource is still maintained.	Response for Ongoing recruitmentAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Refreshed cohort Recommended	No	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: descriptionModule.detailedDescription “Wave 3 took place in 2010/2011, when participants were aged 19-21 years and involved a postal follow-up complemented by telephone interview and on-line questionnaires.” Page: https://clinicaltrials.gov/study/NCT03283332 Data-dictionary definition requires periodic re-assessment or new waves to MAINTAIN DATA CURRENCY. DASH re-assessed existing participants several times (2005/2006, 2010/2011, 2012-2014), so this is not a one-off follow-up; however no collection has occurred since March 2014 and no new wave is announced, so the cohort is not currently being refreshed. Conservative scoring per data-dictionary rule 8 → is_refreshed = FALSE. Flagged for owner confirmation.	Response for Refreshed cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Recontact success rate Recommended	97.00	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “A 10% subsample (N=665, 97% participation rate) took part in the pilot follow-up completed in March 2014.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ FILLED 2026-08-05 (was NULL). recontact_success_rate = 97.00, the participation rate among those invited to the 2012-2014 follow-up. IMPORTANT SCOPE: this is participation among the invited 10% sub-sample, achieved after 81% of the full cohort could be traced — so 97% should not be read as a whole-cohort recontact yield. Both figures are recorded here so the number is not quoted out of context.	Response for Recontact success rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Retention rate Recommended	72.00	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “In 2005–2006, 4785 (88% of children in 49 schools, 72% of the initial cohort) participated in the first follow-up aged 14–16 years.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ CORRECTED 2026-08-05 from 71.99 to 72.00. The previous value was computed as 4782/6643 from the 2015 abstract. The study's own papers give three different wave-2 numerators (4,779 / 4,782 / 4,785), so rather than choose between them the field now uses the retention percentage the authors state directly and repeat across the 2015 review and this 2016 paper: 72% of the initial cohort.	Response for Retention rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Published references Recommended	doi:10.1093/ije/dym094, doi:10.1007/s00127-015-1047-9, doi:10.1136/bmjopen-2016-013221, doi:10.1186/s12966-019-0780-y	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Article metadata “A 10% subsample (N=665, 97% participation rate) took part in the pilot follow-up completed in March 2014.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ ADDED 2026-08-05: doi:10.1136/bmjopen-2016-013221 is the primary open-access report of the young-adult sweep and the source of the retention and recontact figures. Harding S et al. The Determinants of young Adult Social well-being and Health (DASH) study: diversity, psychosocial determinants and health. Soc Psychiatry Psychiatr Epidemiol. 2015. https://doi.org/10.1007/s00127-015-1047-9 Section: DOI metadata “10.1007/s00127-015-1047-9” Page: https://doi.org/10.1007/s00127-015-1047-9 2015 programme review covering psychosocial determinants and mental health. Harding S, Whitrow M, Maynard MJ, Teyhan A. Cohort profile: The DASH (Determinants of Adolescent Social well-being and Health) Study, an ethnically diverse cohort. Int J Epidemiol. 2007;36(3):512-517. https://doi.org/10.1093/ije/dym094 Section: DOI metadata “10.1093/ije/dym094” Page: https://doi.org/10.1093/ije/dym094 2007 IJE cohort profile — the canonical cohort profile reference. Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19. https://doi.org/10.1186/s12966-019-0780-y Section: Article metadata “the 25-item self-report Strengths and Difficulties Questionnaire (SDQ)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/ ADDED 2026-08-05: doi:10.1186/s12966-019-0780-y is the most recent open-access DASH paper with mental health as the outcome and documents the SDQ version used.	Response for Published referencesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Notes Recommended	Acronym expansion varies across the study's own outputs: the 2007 cohort profile and current KCL/catalogue records use "Determinants of Adolescent Social Wellbeing & Health", while the 2015 review title uses "Determinants of young Adult Social well-being and Health" to reflect the cohort ageing into adulthood. Published wave-2 participant counts also differ between the study's own papers (4,785 in the 2015 Methods and 2016 BMJ Open; 4,779 in the 2015 Appendix Table 3, the 2019 paper and the Catalogue of Mental Health Measures; 4,782 in the 2015 abstract); retention_rate uses the authors' own repeated "72% of the initial cohort" figure rather than selecting between numerators. primary_site_id=13 (IoPPN) is used as this database's King's College London anchor: DASH is a KCL study, but it sits in the Department of Population Health Sciences, School of Life Course & Population Health Sciences — not in the IoPPN. A dedicated KCL population-health site row would be more precise. The legacy project website dash.sphsu.mrc.ac.uk is retired and now serves only a notice pointing to the University of Glasgow Enlighten record (eprints.gla.ac.uk/353350), which is a metadata stub linking to a Conifer web capture on a platform discontinued in June 2026; the live KCL project page is therefore used as website_url.	Field-cited	Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19. https://doi.org/10.1186/s12966-019-0780-y Section: Methods — Design and sample “In 2005–06, 4779 of the pupils, from 49 schools, participated in the follow-up study at the age of 14–16 years” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/ Documents the wave-2 count discrepancy recorded in notes: 4,779 here and in the 2015 Appendix Table 3 and the Catalogue, against 4,785 in the 2015 Methods and 2016 BMJ Open, and 4,782 in the 2015 abstract. University of Glasgow Enlighten — DASH archived website record (eprint 353350) https://eprints.gla.ac.uk/353350/ Section: Enlighten eprint record “Full text not currently available from Enlighten.” Page: https://eprints.gla.ac.uk/353350/ Supports the note that the Glasgow archive record is a metadata stub rather than usable study content.	Response for NotesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

3D cohort mapping

Consent, characterisation, and data availability axes used on the cohort map.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Consent level (axis) Required	3 — Broad consent (recontactable for future studies)	Field-cited	DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: Why me? / What happens after the interview? “We will also ask your permission to contact you again in the future to send you information about the findings of the study as they become available, and perhaps to ask you to take part in more detailed studies to follow up on findings from this interview.” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf RE-INVESTIGATED and CONFIRMED at Level 3 (2026-08-13), now against the study team own participant-facing consent document recovered from the Wayback Machine, rather than inference from design. Tree re-walk: Step 1 identifiable YES (named participants; the study maintained a contact register with a standing update-your-contact-details route on its website). Step 2 S251 NO (per-wave informed consent under MREC approval). Step 3 recontact consent YES — the information sheet explicitly asks permission for future contact, and its wording, We are not asking you to take part in a future study now but, with your permission, we may want to contact you about one in the future, is precisely the Level 3 semantics: approachable for new studies, with fresh consent required per study. Step 4 interventional consent NO — nothing consents participants to trials or randomisation, so Level 4 is not met and twics_eligible = FALSE and trial_approach_permitted = unknown stand. SCOPE CAVEAT: this explicit permission question is documented for the feasibility wave (N=665); recontact of the wider cohort operated through the study-held contact register (2010 postal survey; 81% traced in 2012-14), and whole-cohort standing recontact-consent wording is not published. Level 3 asserts approachability for NEW RESEARCH via the custodian — NOT that participants are recontactable for clinical trials. Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Ethics “Ethical approval for the study was obtained from the Multi-centre Research Ethics Committee” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Step 1 identifiable: YES — named pupils individually consented and re-approached across four sweeps. Step 2 S251/CAG access: NO — consent-based, no Section 251 support described. Step 3 recontact consent: YES — participants were retraced and re-approached in 2010/2011 and again in 2012-2014, when consent rates ranged between 85 and 90 % for new biomedical measures and linkage of health and administrative records. Step 4 specific interventional/randomisation consent: NO — DASH is registered on ClinicalTrials.gov as an OBSERVATIONAL cohort study with intervention type No intervention. → consent_level = 3 (broad consent / recontactable). CONFIRMED, unchanged. Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “Written informed consent was obtained from all participants.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ Corroborates consent-based (not Section 251) access at step 2 of the consent decision tree. DASH study website FAQs page (2010) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20101105135228/http://dash.sphsu.mrc.ac.uk/FAQs.html Section: FAQs — Is my information confidential? / site navigation “All information from these has now been anonymised; names and any other identifying material were removed” Page: https://web.archive.org/web/20101105135228/http://dash.sphsu.mrc.ac.uk/FAQs.html Corroborates the two-register model behind steps 1 and 3: analysis data are de-identified while the study separately maintained participant contact details, with a standing update route on the 2010 website. Identifiability for recontact therefore sat with the study team contact register, not the analysis dataset.	Response for Consent level (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Characterisation depth (axis) Required	3 — Multi-domain MH characterisation	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Measures / Appendix Table 3 “The self-report version of the Strengths and Difficulties Questionnaire (SDQ), was used to screen for child mental health problems” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Step 1 research-specific validated MH instruments: YES (25-item self-report SDQ across adolescence; GHQ-12 at ages 21-23) → above Level 1. Step 2 multiple research domains beyond MH symptoms: YES — anthropometry, blood pressure, lung function, bio-impedance, pulse wave velocity, 24 h dietary recall, physical activity diary, plus area- and school-level ecological data → continue. Step 3 research-grade diagnostic interview (SCID/MINI/SCAN) AND actively refreshed: NO to both — SDQ and GHQ-12 are screening instruments, the 42 qualitative interviews are not diagnostic assessments, and no data collection has occurred since March 2014. → characterisation_depth = 3. CONFIRMED, unchanged.	Response for Characterisation depth (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data availability (axis) Required	4 — Multi-modal	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Accelerometry data (activPAL)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ CORRECTED 2026-08-05 from 3 to 4. DERIVED per data-dictionary.md: hasResearch = questionnaire OR cognitive OR physical OR linked_health → TRUE (main questionnaire + physical measures). hasBiological = biosamples OR genomic OR omics → TRUE (saliva cotinine at 11-13; 25 ml blood with DNA extraction and storage at 21-23). hasAdvanced = imaging OR wearable OR digital phenotyping → TRUE (activPAL accelerometry at 21-23), previously recorded as FALSE. hasAdvanced AND hasBiological → data_availability = 4.	Response for Data availability (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cohort map group (derived) Recommended	Group 1	Internal	Internal catalogue field	—	—
Population type Recommended	General population	Field-cited	DIGIT Cohort Portfolio Review — population type and engagement classification (Aug 2026) Classified general_population in the DIGIT cohort portfolio review (Aug 2026). School-based multi-ethnic adolescent cohort recruited across inner London irrespective of health status. ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: eligibilityModule.studyPopulation “School children, aged 11-13 years, representing the main UK ethnic groups (White-European, Black African, Black Caribbean, Indian, Pakistani/Bangladeshi, Other, mainly mixed race).” Page: https://clinicaltrials.gov/study/NCT03283332 general_population per data-dictionary decision rule: entry to DASH required only attendance at one of 51 participating schools, with no diagnosis, clinical-service contact or health-based entry criterion. Whole mixed-ability classes were sampled. Not case_enriched (no self-selection on a condition), not clinical, not occupational, not a data_resource, not an umbrella.	Response for Population typeAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Industry engagement status Recommended	Unknown	Not published	Searched — not published UNSOURCEABLE: industry engagement status is an organisational property of the custodian and is not publicly documented; default 'unknown' pending a cohort-owner meeting. unknown (the column default), and deliberately not inferred. The data-dictionary states this field is populated from cohort-owner meetings and that never_considered in particular must be recorded directly from an owner meeting, never inferred. No public source states whether DASH has supplied data to a commercial study or has any industry access route. Searched: ClinicalTrials.gov NCT03283332 IPD sharing statement, the Catalogue of Mental Health Measures record, the HDR UK Gateway record, the KCL project page and the 2016 BMJ Open data sharing statement. This is a direct question for the owner meeting.	Response for Industry engagement statusAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Parent cohort / programme Recommended	No value held	Not published	NULL: DASH is a standalone cohort, not a sub-study, extension, wave or umbrella member of another cohort in this database. It was recruited directly from 51 London schools rather than from within a parent programme. Checked against the cohort list for a plausible parent (no MRC/CSO SPHSU or KCL umbrella cohort row exists that DASH sits under).	Response for Parent cohort / programmeAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TWiCs eligible Recommended	No	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: armsInterventionsModule “No intervention” Page: https://clinicaltrials.gov/study/NCT03283332 FALSE. TWiCs eligibility requires consent_level = 4 (active interventional consent) plus randomisation infrastructure. DASH is consent_level 3 and is registered as an observational cohort with no intervention.	Response for TWiCs eligibleAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Data modalities

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Questionnaire / interview Recommended	Yes	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Measures “The self-report version of the Strengths and Difficulties Questionnaire (SDQ), was used to screen for child mental health problems” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ TRUE-when condition met: named, validated instruments (SDQ, GHQ-12, Parental Bonding Instrument) applied as part of the research protocol.	Response for Questionnaire / interviewAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cognitive testing Recommended	No	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Perceived parental care and control measured using the Parental Bonding Instrument” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FALSE per data-dictionary FALSE-when rule. Appendix Table 3 enumerates every measure collected at each sweep and lists no standardised cognitive or neuropsychological test (no CANTAB, CogState, n-back, Stroop, TMT or WAIS subtests). The SDQ and Parental Bonding Instrument are self-report psychometric questionnaires, which the dictionary explicitly excludes from cognitive data.	Response for Cognitive testingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Physical measures Recommended	Yes	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Physical measures by trained field assistants/nurses “Pulse wave velocity, augmentation index (TensioWin Arteriograph 24)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ TRUE-when condition met: objective measurements taken on participants — standing and sitting height, weight, waist/hip/arm circumference, blood pressure, bio-impedance, lung function, pulse wave velocity, plus HbA1c and cholesterol from blood at 21-23.	Response for Physical measuresAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosamples Recommended	Yes	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “25 ml blood sample (biochemistry, haematology, gut hormones, extraction of DNA, storage)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ TRUE-when condition met: banked specimens exist — saliva at ages 11-13 and a 25 ml blood draw at ages 21-23 explicitly collected for storage with DNA extraction.	Response for BiosamplesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genomic data Recommended	No	Field-cited	Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Genetic data “Not collected” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH FALSE. The catalogue explicitly records genetic data as not collected. This is consistent with the data-dictionary FALSE-when rule: DASH extracted and stored DNA from the 21-23 blood draw, but no genotyping or sequencing is reported, so the DNA counts only towards has_biosamples.	Response for Genomic dataAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Omics Recommended	No	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “25 ml blood sample (biochemistry, haematology, gut hormones, extraction of DNA, storage)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FALSE. Appendix Table 3 lists only clinical biochemistry, haematology and gut hormone assays, which the dictionary assigns to has_physical_measures. No proteomics, metabolomics, transcriptomics or methylation platform is described in any source consulted.	Response for OmicsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging Recommended	No	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Bio-impedance” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FALSE. Appendix Table 3 is an exhaustive per-sweep list of measures and contains no MRI, PET, SPECT, EEG, MEG, DEXA or retinal imaging. Bio-impedance is a body-composition measure, not imaging.	Response for ImagingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Wearable / sensor Recommended	Yes	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Accelerometry data (activPAL)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ CORRECTED 2026-08-05 from FALSE to TRUE. Appendix Table 3 records activPAL accelerometry collected at the 21-23 year sweep, which meets the TRUE-when condition (body-worn device accelerometry). Collected in the 665-participant feasibility sub-sample only — noted here so the scope is not overstated. This correction propagates to data_availability (3 → 4).	Response for Wearable / sensorAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Digital phenotyping Recommended	No	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Qualitative interviews “Topics: employment/study, finances, housing, ethnic and religious identity, relationships with family/peers, physical and mental health, opportunities and challenges in transition to adulthood, understanding the General Health Questionnaire” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FALSE. No passive smartphone or sensor stream (GPS traces, screen time, call/text metadata, app usage, voice analysis) appears anywhere in the per-sweep measure list. The 2010/2011 online questionnaire is questionnaire data delivered digitally, which the dictionary explicitly excludes.	Response for Digital phenotypingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Linked health records Recommended	No	Field-cited	Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Linkage to administrative data “Education data” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH FALSE. The only administrative linkage recorded is education data, captured separately by has_education_linkage. No NHS/HES, GP, prescribing or ONS mortality linkage is asserted by any source. The 2015 review reports that 85-90 % of the 2012-2014 feasibility sub-sample CONSENTED to linkage of health and administrative records, but consent to future linkage is not evidence that linkage was established.	Response for Linked health recordsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosample types Recommended	saliva, blood, DNA	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “25 ml blood sample (biochemistry, haematology, gut hormones, extraction of DNA, storage)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ CORRECTED 2026-08-05 from ARRAY[saliva] to ARRAY[saliva, blood, DNA]. The previous value captured only the saliva collected at ages 11-13 and missed the 25 ml blood draw with DNA extraction and storage at ages 21-23, both named explicitly in the same table row.	Response for Biosample typesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genotyping platform Recommended	No value held	Field-cited	Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Genetic data “Not collected” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH NULL. No genotyping was performed, so no platform applies.	Response for Genotyping platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging modalities Recommended	No value held	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Bio-impedance” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ NULL. No imaging modality appears in the exhaustive per-sweep measure list; consistent with has_imaging_data = FALSE.	Response for Imaging modalitiesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Mental health measures Recommended	Strengths and Difficulties Questionnaire (SDQ), 25-item self-report, General Health Questionnaire (GHQ-12), Parental Bonding Instrument (PBI)	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Analysis “Linear regression models were used to examine ethnic differences in General Health Questionnaire (GHQ-12) scores” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FILLED 2026-08-05: GHQ-12 added to the array. The previous value listed only the SDQ and the Parental Bonding Instrument and omitted the GHQ-12, which is the mental health outcome measure at the 21-23 year sweep. Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19. https://doi.org/10.1186/s12966-019-0780-y Section: Methods — Outcome “the 25-item self-report Strengths and Difficulties Questionnaire (SDQ)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/ Specifies the SDQ version administered, now recorded in the array.	Response for Mental health measuresAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Data subcategories

Structured modality and subcategory rows used alongside the high-level data-type flags.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Data modality: Blood sample Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · biosamples · biospecimen type · parent: Biospecimen collection · 25 ml blood sample at 21-23y for biochemistry, haematology and gut hormones, with storage · Feasibility sub-sample only (N=665); the source notes relatively high missing data for blood biomarkers.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “25 ml blood sample (biochemistry, haematology, gut hormones, extraction of DNA, storage)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Marked only at the 21-23y sweep, i.e. the 665-participant feasibility sub-sample.	Response for Data modality: Blood sampleAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: DNA sample Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · biosamples · biospecimen type · parent: Biospecimen collection · DNA extracted and stored from the 21-23y blood sample · DNA was extracted and stored but no genotyping or sequencing is reported.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “extraction of DNA, storage” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ DNA was extracted and stored from the 21-23y blood draw. Recorded as a biosample only: no genotyping or sequencing is reported anywhere, so has_genomic_data remains FALSE.	Response for Data modality: DNA sampleAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Saliva sample Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · biosamples · biospecimen type · parent: Biospecimen collection · Saliva collected at 11-13y for cotinine assay · Used to validate self-reported smoking in a sub-sample.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Cotinine (measured from saliva sample)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Saliva collected at the 11-13y sweep for cotinine assay.	Response for Data modality: Saliva sampleAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Biospecimen collection Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · biosamples · category marker · Saliva at 11-13y; 25 ml blood at 21-23y	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “25 ml blood sample (biochemistry, haematology, gut hormones, extraction of DNA, storage)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Category marker covering both specimen types collected.	Response for Data modality: Biospecimen collectionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Genotyping array Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	not available · genomics · derived genomic data · The Catalogue of Mental Health Measures records genetic data as not collected. DNA was extracted and stored from the 21-23y blood draw, but no genotyping or sequencing has been reported.	Field-cited	Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Genetic data “Not collected” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Recorded as availability_status=not_available on the strength of an explicit published negative, rather than omitted. Sponsors asking whether DASH holds genetic data get a sourced No.	Response for Data modality: Genotyping arrayAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Linked NHS records Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	not available · linked health records · category marker · No NHS/HES record linkage is asserted by any source. 85-90% of the 2012-2014 feasibility sub-sample consented to linkage of health and administrative records, but consent to future linkage is not evidence that linkage was established. Administrative linkage actually held is school-level education data.	Field-cited	Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Linkage to administrative data “Education data” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Recorded as not_available: education data is the only administrative linkage listed. Consent for health-record linkage was obtained from 85-90% of the 2012-2014 sub-sample, but no source reports the linkage being established.	Response for Data modality: Linked NHS recordsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Clinical / physical measurements Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · physical measures · category marker · Physical measures taken by trained field assistants/nurses at all three sweeps · Also includes lung function (FEV, FVC, PF) and arterial stiffness (pulse wave velocity and augmentation index by TensioWin Arteriograph 24), which have no dedicated vocabulary keys.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Physical measures by trained field assistants/nurses “Lung function (FEV, FVC, PF)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Category marker used for the physical measures programme as a whole, including lung function and arterial stiffness which have no dedicated vocabulary keys.	Response for Data modality: Clinical / physical measurementsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Anthropometry Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · physical measures · clinical physical measure · parent: Clinical / physical measurements · Standing height, sitting height, weight, waist, hip and arm circumference at all three sweeps; pubertal stage at 11-13y and 14-16y	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Physical measures “Waist circumference” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Appendix Table 3 lists standing height, sitting height, weight, waist, hip and arm circumference, and pubertal stage across the sweeps.	Response for Data modality: AnthropometryAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Blood pressure / vitals Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · physical measures · clinical physical measure · parent: Clinical / physical measurements · Blood pressure at all three sweeps	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Physical measures “Blood pressure” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Marked as collected at all three sweeps.	Response for Data modality: Blood pressure / vitalsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Body composition Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · physical measures · clinical physical measure · parent: Clinical / physical measurements · Bio-impedance at 14-16y and 21-23y	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Physical measures “Bio-impedance” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Marked at the 14-16y and 21-23y sweeps only.	Response for Data modality: Body compositionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Lipid profile Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · physical measures · clinical physical measure · parent: Clinical / physical measurements · Total and HDL cholesterol, plus HbA1c, from the 21-23y blood sample · Blood biomarkers were collected only at 21-23y, in the feasibility sub-sample.	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Abstract — Results “At 21–23 years, glycated haemoglobin (HbA1c) was higher among Black Caribbean females, total cholesterol higher and high-density lipoprotein (HDL) cholesterol lower among Pakistani/Bangladeshis.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ Confirms measured total and HDL cholesterol plus HbA1c, derived from the 21-23y blood sample. The same paper states blood biomarkers were collected only at 21-23 years.	Response for Data modality: Lipid profileAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Questionnaire / interview data Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · questionnaires · category marker · Main self-complete questionnaire at all three sweeps: socio-economic circumstances, family life, psychosocial measures, lifestyle, health, parental health	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Self-complete questionnaires “Main questionnaire: socio-economic circumstances, family life, psychosocial measures, lifestyle, health, parental health” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Marked as collected at all three sweeps in Appendix Table 3.	Response for Data modality: Questionnaire / interview dataAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: GHQ-12 / GHQ Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · questionnaires · questionnaire instrument · parent: Questionnaire / interview data · GHQ-12 at 21-23y; score of 4 or more indicates psychological distress · Collected only in the 665-participant feasibility sub-sample.	Field-cited	Read UM et al. The influence of racism on cigarette smoking: Longitudinal study of young people in a British multiethnic cohort. PLoS One. 2018;13(1):e0190496. https://doi.org/10.1371/journal.pone.0190496 Section: Quantitative measures “The General Health Questionnaire (GHQ-12) [ 54 ] was used at 21-23y with a score of ≥4 indicating psychological distress.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5783341/ Confirms both the instrument and the distress threshold, and that it was administered only at the 21-23y sweep.	Response for Data modality: GHQ-12 / GHQAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Parental Bonding Instrument (PBI) Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · questionnaires · questionnaire instrument · parent: Questionnaire / interview data · Brief form of the Parental Bonding Instrument; perceived parental care and control · Psychosocial exposure measure rather than a mental health outcome.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Table footnotes “Perceived parental care and control measured using the Parental Bonding Instrument” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ The Methods describe the brief form of the instrument being used to assess perceived parenting style.	Response for Data modality: Parental Bonding Instrument (PBI)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: SDQ Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · questionnaires · questionnaire instrument · parent: Questionnaire / interview data · 25-item self-report SDQ at 11-13y and 14-16y; Total Difficulties Score summed from 20 items · Used as a screening instrument. A cut-off of TDS>17 identifies probable clinical cases; no diagnostic interview was administered.	Field-cited	Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19. https://doi.org/10.1186/s12966-019-0780-y Section: Methods — Outcome “the 25-item self-report Strengths and Difficulties Questionnaire (SDQ)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/ Specifies the SDQ version administered. The 2015 review adds that it was used to screen for child mental health problems and that a Total Difficulties Score summed from 20 items was derived.	Response for Data modality: SDQAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data modality: Accelerometry Recommended Confirm this row is correctly typed as a category marker, named instrument/interview, biospecimen type, assay/data product, imaging modality, sensor stream, or linked-record type; add missing named instruments/sample types where known.	available · wearables · wearable sensor data · activPAL accelerometry at 21-23y · Feasibility sub-sample only (N=665), not the whole cohort.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — summary of data collected “Accelerometry data (activPAL)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Marked only at the 21-23y sweep. This is the modality that makes has_wearable_data TRUE and drives data_availability to 4, so its 10%-sub-sample scope is recorded in the row detail.	Response for Data modality: AccelerometryAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Consent and use permissions

Specific use permissions separate from the 3D consent-level axis.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Consent/use: Biosample research use Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	permitted · biosample use · local operational permission · 2012-2014 feasibility sub-sample (N=665) · Blood was collected explicitly for storage and DNA extraction; consent rates ranged between 85 and 90% for the new biomedical measures. Per the information sheet, stored blood/DNA is held by the MRC as custodian (not owner) for use in future research into the genetic basis for disease and response to treatment, with a documented participant withdrawal route.	Field-cited	DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: Why are we asking for a blood sample and what will happen to it? “then stored by the MRC for use in future research into the genetic basis for disease and the response to treatment” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Broad future-research consent for the stored blood/DNA, with MRC custodianship and a documented withdrawal route. Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Results — feasibility study “consent rates ranged between 85 and 90 % for new biomedical measures and linkage of health and administrative records” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Blood was collected explicitly for storage and DNA extraction at 21-23y under this consent. Scope is the 665-participant feasibility sub-sample, recorded in population_scope.	Response for Consent/use: Biosample research useAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Industry / commercial research considered Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	unknown · commercial use · local operational permission · No public statement on industry or commercial access. Mirrors industry_engagement_status=unknown; to be established directly with the cohort owners.	Not published	Searched — not published UNSOURCEABLE: no public statement on industry or commercial access. Searched the ClinicalTrials.gov IPD sharing statement, the Catalogue of Mental Health Measures record, the HDR UK Gateway record via find.data.gov.scot, the KCL project page and the 2016 BMJ Open data sharing statement. Left unknown to match industry_engagement_status; a direct question for the owner meeting.	Response for Consent/use: Industry / commercial research consideredAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Health record linkage permitted Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	permitted · data linkage · local operational permission · 2012-2014 feasibility sub-sample (N=665) · Consent rates of 85-90% were achieved for linkage of health and administrative records; the information sheet names the targets as information held by the NHS Information Centre and records maintained by the General Register Office. Consent was obtained; the linkage itself is not reported as established.	Field-cited	DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: What happens after the interview? “During the interview we will ask you if we can continue to follow up on your health by accessing information held by the NHS Information Centre” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Names the two linkage targets for which consent was sought. Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Results — feasibility study “consent rates ranged between 85 and 90 % for new biomedical measures and linkage of health and administrative records” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Consent for linkage was obtained at these rates in the feasibility sub-sample. Recorded as permitted, but the corresponding cohort_data_modalities row for linked_nhs_records is not_available: consent to future linkage is not evidence that linkage was established.	Response for Consent/use: Health record linkage permittedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Data sharing permitted Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	permitted · data sharing · local operational permission · All consented participants · Data sharing policy follows MRC guidance with the stated aim of making data as widely and freely available as possible while safeguarding participant privacy.	Field-cited	DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: What will you do with the results of the study? “We will only share your anonymised data with other trusted researchers if you agree, and will not otherwise share your data with any third party.” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Consent-gated sharing of anonymised data with trusted researchers — matches the collaboration-mediated access route. ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: ipdSharingStatementModule “The DASH data are available to researchers via a data request to the MRC Social and Public Health Science Unit.” Page: https://clinicaltrials.gov/study/NCT03283332 The same statement records that the policy follows MRC guidance with the aim of making data as widely and freely available as possible while safeguarding participant privacy.	Response for Consent/use: Data sharing permittedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Collaboration required Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	restricted · governance · duo modifier · All applicants · All potential collaborators work with a link person, an experienced DASH researcher, to support access to and analysis of the data.	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: ipdSharingStatementModule “All potential collaborators work with a link person, an experienced DASH researcher-to support their access to and analysis of the data.” Page: https://clinicaltrials.gov/study/NCT03283332 Recorded as restricted rather than not_permitted: access is available but routed through a named study-team collaborator.	Response for Consent/use: Collaboration requiredAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Section 251 / CAG support Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	not applicable · governance · legal governance context · DASH operates on individual informed consent, not Section 251/CAG support.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Ethics “Informed consent was obtained from all participants before their inclusion in the study.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ not_applicable: DASH runs on individual informed consent, so Section 251/CAG support is not part of its legal basis.	Response for Consent/use: Section 251 / CAG supportAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Participant recontact permitted Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	permitted · recontact · local operational permission · Explicit for 2012-14 feasibility participants; wider cohort via the study-held contact register · The feasibility information sheet explicitly asked permission to contact participants again about findings and possible further studies, stating that any future study would come with its own consent. The team maintained a contact register with an update-your-contact-details route on the study website and mailed the cohort for the 2010 postal sweep; 81% of the cohort (5,414 of 6,643) was traceable in 2012-14. Whole-cohort standing recontact-consent wording is not published — confirm scope with the owners.	Field-cited	DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: What happens after the interview? “We will also ask your permission to contact you again in the future to send you information about the findings of the study as they become available, and perhaps to ask you to take part in more detailed studies to follow up on findings from this interview.” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf The explicit recontact-permission question, in the study team own words — asked of feasibility participants. Any future study carries its own consent, which is exactly the boundary consent_level 3 draws. Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “81% (5414 of 6643) of the cohort was traced through friendship networks, social media, and community campaigns” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ Demonstrated in practice rather than only on paper: participants were retraced and re-approached roughly a decade after baseline, and 97% of those invited took part.	Response for Consent/use: Participant recontact permittedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Health / medical / biomedical research use Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	permitted · research use · duo permission · DUO:0000002 · All consented participants · Ethical approval from the Multi-centre Research Ethics Committee and, while participants were at school, local education authorities; informed consent obtained from all participants.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Ethics “Ethical approval for the study was obtained from the Multi-centre Research Ethics Committee” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Individual informed consent for health research, granted under MREC approval and, while participants were at school, local education authority approval.	Response for Consent/use: Health / medical / biomedical research useAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Consent/use: Approach for trials permitted Recommended Confirm status, population scope, whether the permission is a DUO-style restriction/permission or a local operational permission, and whether academic and industry/commercial use differ.	unknown · trial approach · local operational permission · No source states that participants consented to be approached about clinical trials. DASH is registered as an observational study with no intervention. To be confirmed with the cohort owners.	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: armsInterventionsModule “No intervention” Page: https://clinicaltrials.gov/study/NCT03283332 UNKNOWN, deliberately not inferred from consent_level. DASH is registered as an observational cohort with no intervention, and no source states that participants consented to be approached about trials. Per the data-dictionary, consent_level 3 means participants can be approached but each new study may need fresh consent; that is a general property of the level, not evidence about DASH specifically.	Response for Consent/use: Approach for trials permittedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Access pathways

One or more routes by which researchers can request or analyse data.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Access pathway: Collaboration required Recommended Confirm route, access level, environment type, DAC review, collaboration, data sharing agreement, output checking, platform, timeline, cost, URL, and whether multiple routes are possible.	available on application · access level: custodian review · environment: unknown · collaboration required · DASH study team link person · Free · All potential collaborators work with a link person, an experienced DASH researcher, to support their access to and analysis of the data. Variable-level metadata is described as available from the study team.	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: ipdSharingStatementModule “All potential collaborators work with a link person, an experienced DASH researcher-to support their access to and analysis of the data.” Page: https://clinicaltrials.gov/study/NCT03283332 A second, distinct pathway: access is mediated by an assigned member of the study team. The same statement notes that variable-level metadata is available from the study team.	Response for Access pathway: Collaboration requiredAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Access pathway: Direct application Recommended Confirm route, access level, environment type, DAC review, collaboration, data sharing agreement, output checking, platform, timeline, cost, URL, and whether multiple routes are possible.	available on application · access level: custodian review · environment: unknown · collaboration required · MRC-CSO Social and Public Health Sciences Unit, University of Glasgow · Free · Researchers submit a data request to the MRC Social and Public Health Sciences Unit. The Catalogue of Mental Health Measures describes the route as a project proposal. Environment type is unknown: no source states whether data are released as an extract or analysed in a controlled environment. Cost reflects the HDR UK Gateway record, which sets usage rights to Free while marking access as Restricted; no fee schedule is published.	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: ipdSharingStatementModule “The DASH data are available to researchers via a data request to the MRC Social and Public Health Science Unit.” Page: https://clinicaltrials.gov/study/NCT03283332 The published access route: a researcher-initiated data request to the Glasgow unit. environment_type is left unknown because no source states whether approved researchers receive an extract or work inside a controlled environment. pathway_url is NULL because every published access URL is dead — the data sharing page and policy PDF cited by the 2016 paper and the Catalogue both return HTTP 404.	Response for Access pathway: Direct applicationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Field

Current value

Evidence

Source evidence

Response

Notes / correction

Access pathway: Collaboration required

Recommended

Confirm route, access level, environment type, DAC review, collaboration, data sharing agreement, output checking, platform, timeline, cost, URL, and whether multiple routes are possible.

available on application · access level: custodian review · environment: unknown · collaboration required · DASH study team link person · Free · All potential collaborators work with a link person, an experienced DASH researcher, to support their access to and analysis of the data. Variable-level metadata is described as available from the study team.

Field-cited

ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH)
https://clinicaltrials.gov/study/NCT03283332
Section: ipdSharingStatementModule
“All potential collaborators work with a link person, an experienced DASH researcher-to support their access to and analysis of the data.”
Page: https://clinicaltrials.gov/study/NCT03283332
A second, distinct pathway: access is mediated by an assigned member of the study team. The same statement notes that variable-level metadata is available from the study team.

AccurateNeeds correctionNot sureDoes not apply

Access pathway: Direct application

Recommended

Confirm route, access level, environment type, DAC review, collaboration, data sharing agreement, output checking, platform, timeline, cost, URL, and whether multiple routes are possible.

available on application · access level: custodian review · environment: unknown · collaboration required · MRC-CSO Social and Public Health Sciences Unit, University of Glasgow · Free · Researchers submit a data request to the MRC Social and Public Health Sciences Unit. The Catalogue of Mental Health Measures describes the route as a project proposal. Environment type is unknown: no source states whether data are released as an extract or analysed in a controlled environment. Cost reflects the HDR UK Gateway record, which sets usage rights to Free while marking access as Restricted; no fee schedule is published.

Field-cited

ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH)
https://clinicaltrials.gov/study/NCT03283332
Section: ipdSharingStatementModule
“The DASH data are available to researchers via a data request to the MRC Social and Public Health Science Unit.”
Page: https://clinicaltrials.gov/study/NCT03283332
The published access route: a researcher-initiated data request to the Glasgow unit. environment_type is left unknown because no source states whether approved researchers receive an extract or work inside a controlled environment. pathway_url is NULL because every published access URL is dead — the data sharing page and policy PDF cited by the 2016 paper and the Catalogue both return HTTP 404.

AccurateNeeds correctionNot sureDoes not apply

Within-cohort coverage

Aggregate counts or percentages showing how broadly data, consent, or access characteristics apply within the cohort.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Coverage: Cohort successfully traced for the 2012-2014 follow-up Recommended Confirm numerator, denominator, unit type, exactness qualifiers, denominator type, basis, as-of date/release, source wording, and whether the metric is marginal, joint, conditional, or a release total.	5,414 / 6,643 (81.5%) · unit: participants · denominator: total cohort · basis: unknown · status: available · release: 2012-2014 feasibility sub-sample (21-23y) · scope: marginal · source value: 81% (5414 of 6643) of the cohort was traced through friendship networks, social media, and community campaigns · Tracing (locating) success, roughly a decade after baseline — the practical ceiling on any future recontact. coverage_basis is 'unknown' because the controlled vocabulary has no value for tracing/locating; the exact source wording is preserved in source_value.	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “We first tried to locate the sample and 81% (5414 of 6643) of the cohort was traced through friendship networks, social media, and community campaigns.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ Both numerator and denominator explicit. This is the single most decision-relevant number for anyone assessing whether DASH could be re-approached today: it is the practical ceiling on recontact, measured about a decade after baseline. coverage_basis is set to unknown because the controlled vocabulary has no value for tracing/locating.	Response for Coverage: Cohort successfully traced for the 2012-2014 follow-upAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Coverage: Completed a qualitative interview at 21-23y Recommended Confirm numerator, denominator, unit type, exactness qualifiers, denominator type, basis, as-of date/release, source wording, and whether the metric is marginal, joint, conditional, or a release total.	42 / 665 (6.32%) · unit: participants · denominator: wave respondents · basis: completed · status: available · release: 2012-2014 feasibility sub-sample (21-23y) · scope: marginal · source value: 42 qualitative interviews · Identified using stratified purposeful sampling across gender, ethnicity, religion, family type and socio-economic circumstances. Qualitative interview data has no data_modalities vocabulary key, so no target entity is set.	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Design and methods — Study sample “Forty-two participated in qualitative interviews identified using stratified purposeful sampling to achieve broad representation across a range of socio-demographic criteria (gender, ethnicity, religion, family type, SEC).” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ 42 of the 665-participant feasibility sub-sample, so denominator_type is wave_respondents rather than total_cohort. No data_modalities key exists for qualitative interview data, so the metric carries no target entity.	Response for Coverage: Completed a qualitative interview at 21-23yAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Coverage: Participated in the 14-16y follow-up sweep Recommended Confirm numerator, denominator, unit type, exactness qualifiers, denominator type, basis, as-of date/release, source wording, and whether the metric is marginal, joint, conditional, or a release total.	4,785 / 6,643 (72.03%) · unit: participants · denominator: total cohort · basis: completed · status: available · release: 2005/2006 sweep (14-16y) · scope: marginal · source value: 4785 (88% of children in 49 schools, 72% of the initial cohort) · The study's own papers publish three different numerators for this sweep: 4,785 (2015 Methods and 2016 BMJ Open), 4,779 (2015 Appendix Table 3, 2019 paper, Catalogue of Mental Health Measures) and 4,782 (2015 abstract, 2018 paper). 4,785 is used here as the figure given in the Methods sections; the authors' own summary percentage of 72% is what cohorts.retention_rate records.	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “In 2005–2006, 4785 (88% of children in 49 schools, 72% of the initial cohort) participated in the first follow-up aged 14–16 years.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ Numerator and denominator both explicit in one sentence. The study's own papers give three different numerators for this sweep (4,785 / 4,779 / 4,782); 4,785 is used here because it appears in the Methods sections of both the 2015 review and this 2016 paper, and the discrepancy is recorded in the metric notes.	Response for Coverage: Participated in the 14-16y follow-up sweepAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Coverage: Participated in the 21-23y feasibility follow-up Recommended Confirm numerator, denominator, unit type, exactness qualifiers, denominator type, basis, as-of date/release, source wording, and whether the metric is marginal, joint, conditional, or a release total.	665 / 6,643 (10.01%) · unit: participants · denominator: total cohort · basis: completed · status: available · release: 2012-2014 feasibility sub-sample (21-23y) · scope: marginal · source value: A 10% subsample (N=665, 97% participation rate) · A deliberate 10% sub-sample of roughly 100 per major ethnic group, representative by gender and socio-economic circumstances — not a whole-cohort sweep. The 97% figure is participation among those invited, not among the full cohort. All blood biomarker, accelerometry and GHQ-12 data are confined to this sub-sample.	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “A 10% subsample (N=665, 97% participation rate) took part in the pilot follow-up completed in March 2014.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ 665 against the 6,643 baseline cohort gives 10.01%, matching the source's own description of a 10% sub-sample. The 97% figure is participation among those invited and is deliberately NOT used as the coverage percentage here; it is recorded separately in cohorts.recontact_success_rate.	Response for Coverage: Participated in the 21-23y feasibility follow-upAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Linkage and access

Field	Current value	Evidence	Source evidence	Response	Notes / correction
NHS linkage Recommended	No	Field-cited	DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: What happens after the interview? “During the interview we will ask you if we can continue to follow up on your health by accessing information held by the NHS Information Centre” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Names the exact linkage target for which consent was sought in the feasibility wave (85-90 percent consented per the 2015 review). FALSE retained: consent was sought and largely granted, but no source reports the NHS linkage having been established. Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Linkage to administrative data “Education data” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH FALSE. Education data is the only administrative linkage listed. No HES or NHS hospital record linkage is asserted in the Catalogue record, the HDR UK Gateway record, ClinicalTrials.gov or any DASH paper consulted.	Response for NHS linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
GP linkage Recommended	No	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Results — feasibility study “consent rates ranged between 85 and 90 % for new biomedical measures and linkage of health and administrative records” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FALSE. This quote shows participants CONSENTED to future health-record linkage in the 2012-2014 feasibility study; it does not state that GP or primary-care linkage was established. No source consulted asserts completed GP linkage.	Response for GP linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Death registry linkage Recommended	No	Field-cited	HDR UK Innovation Gateway DASH dataset record (publisher DATAMIND), mirrored via find.data.gov.scot dataset 26270 https://find.data.gov.scot/datasets/26270 Section: Gateway dataset metadata “"keywords":["DASH","Mental Health","Adolescence","Physical Measures","Longitudinal","DATAMIND"]” Page: https://find.data.gov.scot/datasets/26270 FALSE. The gateway record describes the resource without any mortality or ONS death-registry linkage, and no other source consulted asserts one. DASH Feasibility Study Participant Information Sheet 1 v6 (03/10/12) — Wayback Machine capture of dash.sphsu.mrc.ac.uk https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf Section: What happens after the interview? “and records maintained by the General Register Office” Page: https://web.archive.org/web/20230321230459/https://dash.sphsu.mrc.ac.uk/DASH%20Feasibility%20Info%20Sheet%201%20v6_031012.pdf The feasibility consent sought permission for General Register Office linkage (births/deaths registration). FALSE retained on the same basis as has_nhs_linkage: consent sought is not linkage established, and no source reports GRO linkage in place.	Response for Death registry linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Education linkage Recommended	Yes	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Appendix Table 3 — Ecological data linked at school level “School performance” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Corroborates the education linkage and defines its granularity: school-level administrative indicators (school performance, absenteeism and truancy, free school meals) linked at ages 11-13 and 14-16. This is school-level linkage, not pupil-level National Pupil Database linkage — worth confirming with the cohort owners. Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Linkage to administrative data “Education data” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH TRUE. Catalogue records education data as the administrative linkage held.	Response for Education linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access mechanism Recommended	direct_application	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: ipdSharingStatementModule “The DASH data are available to researchers via a data request to the MRC Social and Public Health Science Unit.” Page: https://clinicaltrials.gov/study/NCT03283332 direct_application: researchers apply to the data custodian for an extract, rather than analysing inside a TRE or downloading openly. The same statement adds that all potential collaborators work with a link person, an experienced DASH researcher. Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Data — Data access “Project proposal - see data access guidance” Page: https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Corroborates a proposal-based application route. NOTE: the guidance URL the catalogue links to (dash.sphsu.mrc.ac.uk/Data-sharing.html) now returns HTTP 404, as does the data sharing policy PDF cited in the 2016 paper — worth raising with the cohort owners.	Response for Data access mechanismAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TRE platform Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: no TRE or secure data environment is named for DASH. The published access route is a data request to the MRC Social and Public Health Sciences Unit yielding an extract, not TRE-mediated analysis. Searched ClinicalTrials.gov, the Catalogue record, the HDR UK Gateway record and the KCL project page. Left NULL.	Response for TRE platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data dictionary URL Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: no live data dictionary URL exists. The 2016 BMJ Open data sharing statement says variable-level metadata is available from the study team and via the MRC Data Gateway, but publishes no direct link, and the dash.sphsu.mrc.ac.uk data sharing pages it references now return HTTP 404. Searched the Catalogue record, the HDR UK Gateway record and the KCL project page for a replacement. Left NULL.	Response for Data dictionary URLAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access timeline (days) Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: no application-to-access turnaround is published. Searched ClinicalTrials.gov NCT03283332 IPD sharing statement, the Catalogue of Mental Health Measures record, the HDR UK Gateway record via find.data.gov.scot, the KCL project page and the 2016 BMJ Open data sharing statement. The dedicated data sharing policy PDF cited by the 2016 paper is dead (HTTP 404). Left NULL.	Response for Data access timeline (days)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access cost Recommended	Free	Field-cited	HDR UK Innovation Gateway DASH dataset record (publisher DATAMIND), mirrored via find.data.gov.scot dataset 26270 https://find.data.gov.scot/datasets/26270 Section: Gateway dataset licence metadata “"usage_rights":"Free"” Page: https://find.data.gov.scot/datasets/26270 FILLED 2026-08-05 (was NULL). The gateway dataset record sets usage_rights to Free while marking access as Restricted, i.e. no charge but an approval-gated application. SCOPE: this is the licence usage-rights field, not a published fee schedule — no separate cost schedule exists in any source consulted. Flagged for owner confirmation.	Response for Data access costAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Participant profile and dates

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Age distribution Recommended	Cohort year of birth: ~1990; Approximate age in 2026: 34-37 (mid-30s); Aged 11-13 at recruitment (2002/03): 1	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: eligibilityModule.studyPopulation “School children, aged 11-13 years, representing the main UK ethnic groups” Page: https://clinicaltrials.gov/study/NCT03283332 JSONB encodes that the entire baseline population was aged 11-13 at recruitment (minimumAge 11 Years, maximumAge 13 Years). Catalogue of Mental Health Measures — DASH study record (catalogue record last updated 12/05/2026) https://www.cataloguementalhealth.ac.uk/?content=study&studyid=DASH Section: Sample “Cohort year of birth” Page: https://www.cataloguementalhealth.ac.uk/DASH FILLED 2026-08-13: two keys added alongside the recruitment-age band. Cohort year of birth ~1990 is stated by the Catalogue of Mental Health Measures. Approximate age in 2026 = 34-37 (mid-30s) is arithmetic from the recruitment band: aged 11-13 in the 2002/03 school year implies birth years ~1989-1992, hence ages ~34-37 during 2026, consistent with the catalogue year of birth. Re-derive the age key at the next verification pass; the year is in the key name so staleness is visible.	Response for Age distributionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Sex distribution Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: no baseline male/female split is published in any accessible source. Searched: ClinicalTrials.gov NCT03283332 (records sex ALL with no breakdown), the 2015 review full text and Appendix Table 3, the 2016 BMJ Open paper, the 2019 Int J Behav Nutr Phys Act paper, the Catalogue of Mental Health Measures record (Sex: All), the HDR UK Gateway record and the KCL project page. Published sex counts are analytic-sample specific (for example 2548 males / 2135 females in the 2019 paper's 4683-person analysis sample) and do not describe the 6,643 baseline cohort, so they were deliberately NOT used. The 2007 IJE cohort profile is paywalled. Left NULL.	Response for Sex distributionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ethnicity distribution Recommended	Basis: Six-group split of the 4,785 participants followed from ages 11-13 to 14-16; Indian: 0.088; White UK: 0.182; Black African: 0.186; Black Caribbean: 0.163; Other (mainly mixed): 0.288; Pakistani/Bangladeshi: 0.093; Ethnic minority (baseline): 0.8	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Table 1 — ethnic distribution of measures of structural adversity, psychosocial support, and health behaviours “N = 873” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ FILLED 2026-08-13 with a six-group split. Group Ns are the Table 1 column headers of the 2015 review: White UK 873, Black Caribbean 779, Black African 892, Indian 419, Pakistani/Bangladeshi 446, Other 1376 — total 4,785, the sample followed from ages 11-13 to 14-16. Stored values are these Ns divided by 4,785, rounded to 3 dp (0.182 / 0.163 / 0.186 / 0.088 / 0.093 / 0.288; sum 1.000). SCOPE: proportions describe the followed sample, not the 6,643 baseline — a Basis key states this in the stored value, and the separate Ethnic minority (baseline) key keeps the abstract approximate 80 percent figure, consistent with the non-White share of the six-group split (81.8 percent). Cross-paper discrepancy documented: the 2018 smoking paper prints Other N = 1373 (total 4,782) for the same design, mirroring the wave-2 4779/4782/4785 inconsistency recorded in notes. No baseline six-group split is published in any accessible source; the 2007 cohort profile is paywalled. Harding S et al. The Determinants of young Adult Social well-being and Health (DASH) study: diversity, psychosocial determinants and health. Soc Psychiatry Psychiatr Epidemiol. 2015. https://doi.org/10.1007/s00127-015-1047-9 Section: Abstract — Methods “In 2002/2003, 6643 11-13 year olds in London, ~80 % ethnic minorities, participated in the baseline survey.” Page: https://doi.org/10.1007/s00127-015-1047-9 Stored as approx_ethnic_minority_fraction = 0.80; the source itself gives an approximate figure. ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: descriptionModule.detailedDescription “The DASH Study started as a school-based cohort study of adolescents from the main ethnic groups (White British, Black Caribbean, Black African, Indian, Pakistani and Bangladeshi) in 10 London boroughs.” Page: https://clinicaltrials.gov/study/NCT03283332 Names the sampled ethnic groups behind the aggregate minority fraction.	Response for Ethnicity distributionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Smoking status distribution Recommended	Measure: Ever smoked, self-report; M/F = males/females (cotinine-validated sub-sample at ages 11-13); Indian, 11-13: M 9.6% · F 6.9%; Indian, 14-16: M 24.9% · F 27.5%; White UK, 11-13: M 25.6% · F 26.4%; White UK, 14-16: M 51.1% · F 65.3%; Black African, 11-13: M 19.5% · F 13.8%; Black African, 14-16: M 27.1% · F 31.9%; Black Caribbean, 11-13: M 22.8% · F 28.9%; Black Caribbean, 14-16: M 36.5% · F 55.3%; Other (mainly mixed), 11-13: M 22.7% · F 24.6%; Other (mainly mixed), 14-16: M 43.3% · F 51.1%; Pakistani/Bangladeshi, 11-13: M 20.2% · F 12.2%; Pakistani/Bangladeshi, 14-16: M 39.0% · F 33.8%; Whole-sample ever-smoked figure: Not published	Field-cited	Read UM et al. The influence of racism on cigarette smoking: Longitudinal study of young people in a British multiethnic cohort. PLoS One. 2018;13(1):e0190496. https://doi.org/10.1371/journal.pone.0190496 Section: Tables 2 and 3 — Sample profile at 11-13y and 14-16y by gender and ethnicity “Ever-smoked was based on a binary response of 'no' or 'yes' to "Have you ever smoked a cigarette?"” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5783341/ FILLED 2026-08-06; made fully granular 2026-08-13. SHAPE CAVEAT: DASH does not publish a current/former/never distribution, unlike the GLAD and UK Biobank rows in this column, and publishes no whole-sample figure. What is published is ever-smoked prevalence, stratified by gender and ethnicity at the 11-13y and 14-16y sweeps. The stored JSONB now carries every published cell verbatim from Tables 2 and 3, one flat display-ready key per ethnic group per sweep so the panel renders a card grid matching the ethnicity display (values are short M/F percentage strings). All 24 cell values were machine-checked against the Ever smoked rows of the source tables. Group denominators are the table column headers: White UK 873, Black Caribbean 779, Black African 892, Indian 419, Pakistani and Bangladeshi 446, Other 1373 (total 4,782, the longitudinal analytic sample). Confidence intervals published alongside each percentage are not stored. Self-reported smoking was validated by salivary cotinine in a sub-sample at 11-13y, noted in the Measure key.	Response for Smoking status distributionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Median age Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: DASH is a multi-wave cohort with age bands reported per sweep (11-13, 14-16, 19-21, 21-23) and no single median age published in any source consulted (2015 review, 2016 BMJ Open, 2019 IJBNPA, ClinicalTrials.gov, Catalogue of Mental Health Measures, HDR UK Gateway, KCL project page). Left NULL rather than compute a misleading midpoint.	Response for Median ageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Percent female Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: see sex_distribution. No baseline percentage female is published; analytic-sample splits were rejected as not representative of the 6,643 baseline cohort. Left NULL.	Response for Percent femaleAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Percent non-white Recommended	80.00	Field-cited	Harding S et al. The Determinants of young Adult Social well-being and Health (DASH) study: diversity, psychosocial determinants and health. Soc Psychiatry Psychiatr Epidemiol. 2015. https://doi.org/10.1007/s00127-015-1047-9 Section: Abstract — Methods “In 2002/2003, 6643 11-13 year olds in London, ~80 % ethnic minorities, participated in the baseline survey.” Page: https://doi.org/10.1007/s00127-015-1047-9 percent_non_white = 80.00 as a rounded reading of the approximate figure given by the source. Documented as approximate per data-dictionary rule 5.	Response for Percent non-whiteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Geographic coverage Recommended	regional	Field-cited	HDR UK Innovation Gateway DASH dataset record (publisher DATAMIND), mirrored via find.data.gov.scot dataset 26270 https://find.data.gov.scot/datasets/26270 Section: Gateway location metadata “United Kingdom,England,London” Page: https://find.data.gov.scot/datasets/26270 Recruitment was restricted to 51 schools in 10 named inner London boroughs, which is a defined region rather than national coverage → geographic_coverage = regional.	Response for Geographic coverageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Follow-up duration Recommended	Baseline 2002/2003 (ages 11-13); follow-up 2005/2006 (ages 14-16); postal/telephone/online sweep 2010/2011 (ages 19-21); feasibility sub-sample 2012-2014 (ages 21-23)	Field-cited	Harding S et al. Longitudinal study of cardiometabolic risk from early adolescence to early adulthood in an ethnically diverse cohort. BMJ Open. 2016;6(12):e013221. https://doi.org/10.1136/bmjopen-2016-013221 Section: Materials and methods “In 2005–2006, 4785 (88% of children in 49 schools, 72% of the initial cohort) participated in the first follow-up aged 14–16 years.” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223645/ Supplies the 2005/2006 sweep years and ages recorded in followup_duration. ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: descriptionModule.detailedDescription “Wave 3 took place in 2010/2011, when participants were aged 19-21 years and involved a postal follow-up complemented by telephone interview and on-line questionnaires.” Page: https://clinicaltrials.gov/study/NCT03283332 CORRECTED 2026-08-05: the previous value omitted the 2010/2011 sweep entirely and carried an inline citation in the data value, which breaks playbook rule 6b. Wave numbering differs between sources (the Catalogue labels the 2012 feasibility study Wave 3), so the field now describes sweeps by year and age rather than by wave number.	Response for Follow-up durationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Last data collection date Recommended	No value held	Not published	Searched — not published UNSOURCEABLE at day precision: the most recent collection is reported only to the month — the 2016 BMJ Open paper states the pilot follow-up was completed in March 2014. A DATE column cannot express month precision, and asserting a specific day would overstate what is published, so this is left NULL and the month is carried in followup_duration instead.	Response for Last data collection dateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Recruitment start date Recommended	No value held	Not published	Searched — not published UNSOURCEABLE at day precision: sources give the academic-year window 2002/2003 only (2015 review: recruited between 2002 and 2003; Catalogue start date 2002-2003; ClinicalTrials.gov start date 2011-12-01 refers to the later feasibility study, not baseline recruitment). Left NULL rather than invent a day.	Response for Recruitment start dateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Recruitment end date Recommended	No value held	Not published	Searched — not published UNSOURCEABLE at day precision: no calendar close date for baseline recruitment is published in the 2015 review, 2016 BMJ Open, 2019 IJBNPA, ClinicalTrials.gov, the Catalogue record or the KCL project page. Left NULL.	Response for Recruitment end dateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Diagnosis areas

Mental health diagnosis areas represented in this cohort.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Diagnosis area: Major depressive disorder Recommended Confirm this diagnosis area applies and estimated N if shown.	Major depressive disorder · Mood Disorders	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Analysis “Linear regression models were used to examine ethnic differences in General Health Questionnaire (GHQ-12) scores” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ diagnosis_area_id 5 = Major depressive disorder. CONFIRMED as symptom-level coverage only: depressive symptoms are captured by the SDQ emotional symptoms subscale in adolescence and GHQ-12 distress at 21-23. No diagnostic assessment was administered, so estimated_n and prevalence_rate stay NULL and the note states the limitation explicitly.	Response for Diagnosis area: Major depressive disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Generalised anxiety disorder Recommended Confirm this diagnosis area applies and estimated N if shown.	Generalised anxiety disorder · Anxiety Disorders	Field-cited	Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19. https://doi.org/10.1186/s12966-019-0780-y Section: Methods — Outcome “the 25-item self-report Strengths and Difficulties Questionnaire (SDQ)” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/ diagnosis_area_id 8 = Generalised anxiety disorder. CONFIRMED as symptom-level coverage only: the SDQ emotional symptoms subscale spans anxious and depressive presentations and the GHQ-12 indexes general distress. No anxiety diagnosis was made, so counts stay NULL.	Response for Diagnosis area: Generalised anxiety disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Transdiagnostic (anxiety-depression) Recommended Confirm this diagnosis area applies and estimated N if shown.	Transdiagnostic (anxiety-depression) · Transdiagnostic	Field-cited	Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ Section: Figure 1 caption “Score summed from 20 items assessing conduct problems, hyperactivity, emotional symptoms, and peer problems” Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/ NEW 2026-08-05, replacing an erroneous link to diagnosis_area_id 33. Verified against db/seed/diagnosis_areas.sql and the live database: id 32 = Transdiagnostic (anxiety-depression); id 33 = Long COVID neuropsychiatric, which has no connection to DASH and was recorded in error with a note describing transdiagnostic SDQ coverage. The SDQ Total Difficulties Score spans four symptom domains and the GHQ-12 indexes common mental disorder, so a transdiagnostic mapping is the correct one.	Response for Diagnosis area: Transdiagnostic (anxiety-depression)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Field

Current value

Evidence

Source evidence

Response

Notes / correction

Diagnosis area: Major depressive disorder

Recommended

Confirm this diagnosis area applies and estimated N if shown.

Major depressive disorder · Mood Disorders

Field-cited

Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/
Section: Analysis
“Linear regression models were used to examine ethnic differences in General Health Questionnaire (GHQ-12) scores”
Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/
diagnosis_area_id 5 = Major depressive disorder. CONFIRMED as symptom-level coverage only: depressive symptoms are captured by the SDQ emotional symptoms subscale in adolescence and GHQ-12 distress at 21-23. No diagnostic assessment was administered, so estimated_n and prevalence_rate stay NULL and the note states the limitation explicitly.

AccurateNeeds correctionNot sureDoes not apply

Diagnosis area: Generalised anxiety disorder

Recommended

Confirm this diagnosis area applies and estimated N if shown.

Generalised anxiety disorder · Anxiety Disorders

Field-cited

Huang P et al. Fruit and vegetable consumption and mental health across adolescence: evidence from a diverse urban British cohort study. Int J Behav Nutr Phys Act. 2019;16:19.
https://doi.org/10.1186/s12966-019-0780-y
Section: Methods — Outcome
“the 25-item self-report Strengths and Difficulties Questionnaire (SDQ)”
Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6368762/
diagnosis_area_id 8 = Generalised anxiety disorder. CONFIRMED as symptom-level coverage only: the SDQ emotional symptoms subscale spans anxious and depressive presentations and the GHQ-12 indexes general distress. No anxiety diagnosis was made, so counts stay NULL.

AccurateNeeds correctionNot sureDoes not apply

Diagnosis area: Transdiagnostic (anxiety-depression)

Recommended

Confirm this diagnosis area applies and estimated N if shown.

Transdiagnostic (anxiety-depression) · Transdiagnostic

Field-cited

Europe PMC full-text XML — PMC4519637 (Harding et al. 2015 DASH review, incl. Appendix Table 3 summary of data collected)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/
Section: Figure 1 caption
“Score summed from 20 items assessing conduct problems, hyperactivity, emotional symptoms, and peer problems”
Page: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519637/
NEW 2026-08-05, replacing an erroneous link to diagnosis_area_id 33. Verified against db/seed/diagnosis_areas.sql and the live database: id 32 = Transdiagnostic (anxiety-depression); id 33 = Long COVID neuropsychiatric, which has no connection to DASH and was recorded in error with a note describing transdiagnostic SDQ coverage. The SDQ Total Difficulties Score spans four symptom domains and the GHQ-12 indexes common mental disorder, so a transdiagnostic mapping is the correct one.

AccurateNeeds correctionNot sureDoes not apply

Linked sites

Sites contributing participants or data to this cohort.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Linked site: Institute of Psychiatry, Psychology & Neuroscience Recommended	Institute of Psychiatry, Psychology & Neuroscience · London	Field-cited	King's College London — DASH: Determinants of Adolescent Social Wellbeing & Health project page https://www.kcl.ac.uk/research/dash-2 Section: Project page — Principal Investigator / Contact us “seeromanie.harding@kcl.ac.uk” Page: https://www.kcl.ac.uk/research/dash-2 CONFIRMED with a stronger source than the previous author-affiliation inference. DASH is hosted by King's College London: KCL publishes the live project page, and ClinicalTrials.gov records King's College London as leadSponsor. Site 13 is this database's KCL anchor; see the primary_site_id provenance row for the IoPPN versus Population Health Sciences caveat.	Response for Linked site: Institute of Psychiatry, Psychology & NeuroscienceAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Linked site: University of Glasgow / NHS Greater Glasgow and Clyde Recommended	University of Glasgow / NHS Greater Glasgow and Clyde · Scotland	Field-cited	ClinicalTrials.gov NCT03283332 — Determinants of Adolescent, Now Young Adults, Social Well-being and Health: Longitudinal Follow-up (DASH) https://clinicaltrials.gov/study/NCT03283332 Section: ipdSharingStatementModule “The DASH data are available to researchers via a data request to the MRC Social and Public Health Science Unit.” Page: https://clinicaltrials.gov/study/NCT03283332 CONFIRMED. Site 19 = University of Glasgow / NHS Greater Glasgow and Clyde. The MRC-CSO Social and Public Health Sciences Unit at Glasgow is named as the data custodian in the published data sharing statement, and the Catalogue of Mental Health Measures lists the institution as MRC Social & Public Health Sciences Unit, University of Glasgow & King's College London.	Response for Linked site: University of Glasgow / NHS Greater Glasgow and ClydeAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Verification metadata

Internal catalogue status — for reference only.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Verification status Recommended	unverified	Internal	Internal catalogue field	—	—
Last verified Recommended	13 Aug 2026	Internal	Internal catalogue field	—	—
Data source Recommended	Verified Aug 2026 against the KCL DASH project page and KCL staff profile for Prof Seeromanie Harding, ClinicalTrials.gov NCT03283332 (API v2), Europe PMC full text for Harding et al. 2015 Soc Psychiatry Psychiatr Epidemiol (PMC4519637), Harding et al. 2016 BMJ Open (PMC5223645) and Huang et al. 2019 Int J Behav Nutr Phys Act (PMC6368762), the Catalogue of Mental Health Measures DASH record, the HDR UK Gateway dataset record mirrored at find.data.gov.scot/datasets/26270 (published by DATAMIND), the retired dash.sphsu.mrc.ac.uk notice, and an ISRCTN XML API search returning no DASH registration. The 2007 IJE cohort profile (doi:10.1093/ije/dym094) is not open access, so it is cited for title and DOI only. Consent model re-investigated Aug 2026 against the archived DASH feasibility Participant Information Sheet v6 (03/10/12) and the 2010 study-website FAQ, both retrieved via the Wayback Machine.	Internal	Internal catalogue field	—	—