Cohort validation pack

QResearch

Generated 6 Oct 2026, 10:37 · ID 24

Unverified

Last verified: 16/04/2026

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

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	40 of 70 reviewable fields are cited to a source (57%) · 8 with no source yet · 22 searched — not published · 28 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	QResearch	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Site header “QResearch” Page: https://www.qresearch.org/	Response for Short nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Full name Required	QResearch	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Site header “QResearch” Page: https://www.qresearch.org/	Response for Full nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Managing organisation Recommended	Queen Mary University of London	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: About “QResearch is hosted within the Wolfson Institute of Population Health at Queen Mary University of London.” Page: https://www.qresearch.org/about/	Response for Managing organisationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Primary site Recommended	Queen Mary University of London (site #26)	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: About “QResearch relocated to Queen Mary University of London in 2025 with the appointment of Professor Hippisley-Cox as the inaugural Professor of Clinical Epidemiology and Predictive Medicine.” Page: https://www.qresearch.org/about/ primary_site_id=26 (Queen Mary University of London site record) matches stated host institution.	Response for Primary siteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Website URL Recommended	https://www.qresearch.org/	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Canonical URL “https://www.qresearch.org/” Page: https://www.qresearch.org/	Response for Website URLAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Catalogue of Mental Health Measures URL Recommended	No value held	No source yet	No citation linked to this field yet.	Response for Catalogue of Mental Health Measures URLAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Contact name Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No single named public cohort contact field identified on reviewed QResearch pages.	Response for Contact nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Contact email Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: Contact emails on site are obfuscated in downloaded HTML snapshot; no stable plaintext address extracted for this field.	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	Large consolidated database derived from anonymised UK general practice electronic health records, with linked secondary care and mortality data for approved research use.	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “QResearch is a large consolidated database derived from the anonymised health records of over 40 million patients.” Page: https://www.qresearch.org/	Response for DescriptionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N Required	40,000,000	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “derived from the anonymised health records of over 40 million patients” Page: https://www.qresearch.org/	Response for Total NAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N qualifier Recommended	approximate	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “over 40 million patients” Page: https://www.qresearch.org/ Public-facing rounded cumulative figure -> approximate.	Response for Total N qualifierAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Year established Recommended	2003	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: About “QResearch was established as a new high quality ethical database for research in 2003 at the University of Nottingham by Professor Julia Hippisley-Cox (Chief Investigator) in collaboration with EMIS Health (now Optum).” Page: https://www.qresearch.org/about/	Response for Year establishedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Active cohort Recommended	Yes	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “The practices are spread throughout the UK and include data from patients who are currently registered with the practices as well as historical patients who may have died or left.” Page: https://www.qresearch.org/	Response for Active cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ongoing recruitment Recommended	No	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “QResearch is a large consolidated database derived from the anonymised health records of over 40 million patients.” Page: https://www.qresearch.org/ Resource is an electronic health record database rather than an open participant-recruitment study cohort -> ongoing_recruitment=FALSE.	Response for Ongoing recruitmentAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Refreshed cohort Recommended	Yes	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “currently registered with the practices as well as historical patients who may have died or left” Page: https://www.qresearch.org/ Ongoing practice participation and longitudinal record accumulation imply periodic data currency updates consistent with refreshed=TRUE.	Response for Refreshed cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Recontact success rate Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No recontact success metric published for the database resource.	Response for Recontact success rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Retention rate Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No participant retention rate applicable to the EHR resource as a whole.	Response for Retention rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Published references Recommended	doi:10.14236/jhi.v12i1.108, doi:10.1136/bmjopen-2014-005809, doi:10.1001/jamapsychiatry.2022.3614	Field-cited	Hippisley-Cox et al. QRESEARCH: a new general practice database for research (Inform Prim Care 2004) https://doi.org/10.14236/jhi.v12i1.108 Section: Citation “doi: 10.14236/jhi.v12i1.108” Page: https://pubmed.ncbi.nlm.nih.gov/15140353/ Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Citation “doi: 10.1136/bmjopen-2014-005809” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ Ranger et al. Preexisting Neuropsychiatric Conditions and Associated Risk… (JAMA Psychiatry 2023) https://doi.org/10.1001/jamapsychiatry.2022.3614 Section: Citation “doi: 10.1001/jamapsychiatry.2022.3614” Page: https://pubmed.ncbi.nlm.nih.gov/36350602/	Response for Published referencesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Notes Recommended	Data are de-identified at source for extracts; linkage and governance are described on the QResearch ethics pages. Applications are via QWeb with QMUL co-applicant requirements.	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Ethics and Confidentiality “Researchers only receive subsets of anonymised data required to answer their research question” Page: https://www.qresearch.org/about/ethics-and-confidentiality/	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	2 — Section 251 / CAG (pseudonymised, no individual consent)	Field-cited	Hippisley-Cox et al. QRESEARCH: a new general practice database for research (Inform Prim Care 2004) https://doi.org/10.14236/jhi.v12i1.108 Section: Ethics and Confidentiality “The processing of patient identifiers for secure data linkage without individual consent has been supported under 'section 251' by the Health Research Authority following advice from the Confidentiality Advisory Group (CAG reference 25/CAG/0147).” Page: https://www.qresearch.org/about/ethics-and-confidentiality/ Decision tree: identifiable processing within controlled system YES; access pathway includes S251-supported linkage without individual consent -> consent_level=2.	Response for Consent level (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Characterisation depth (axis) Required	1 — Routine EHR	Field-cited	Ranger et al. Preexisting Neuropsychiatric Conditions and Associated Risk… (JAMA Psychiatry 2023) https://doi.org/10.1001/jamapsychiatry.2022.3614 Section: DESIGN, SETTING, AND PARTICIPANTS “Prepandemic (2015-2020) and contemporary (2020-2021) longitudinal cohorts were derived from the QResearch database of English primary care records.” Page: https://pubmed.ncbi.nlm.nih.gov/36350602/ Step 1: resource is routine primary care electronic records for observational studies; no cohort-defining battery of research-grade MH instruments -> characterisation_depth=1.	Response for Characterisation depth (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data availability (axis) Required	1 — Clinical records only	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Flag derivation “practices contributing to the QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ DERIVED: all ten modality flags FALSE; has_linked_health_records FALSE because QResearch is itself a health-record archive (linkage sub-fields capture HES/mortality). Formula -> data_availability=1.	Response for Data availability (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cohort map group (derived) Recommended	Group 4	Internal	Internal catalogue field	—	—
Population type Recommended	Data resource	Not published	DIGIT Cohort Portfolio Review — population type and engagement classification (Aug 2026) Classified data_resource in the DIGIT cohort portfolio review (Aug 2026). Anonymised general practice records resource with linked secondary care data.	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.	Response for Industry engagement statusAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Parent cohort / programme Recommended	No value held	No source yet	No citation linked to this field yet.	Response for Parent cohort / programmeAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TWiCs eligible Recommended	No	Field-cited	Hippisley-Cox et al. QRESEARCH: a new general practice database for research (Inform Prim Care 2004) https://doi.org/10.14236/jhi.v12i1.108 Section: Ethics and Confidentiality “The processing of patient identifiers for secure data linkage without individual consent has been supported under 'section 251'” Page: https://www.qresearch.org/about/ethics-and-confidentiality/ consent_level=2 pathway; TWiCs requires active interventional consent model per data-dictionary -> twics_eligible=FALSE.	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	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “risk prediction algorithms developed using the QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ Core resource is routine GP EHR; no cohort-wide named validated MH questionnaire battery is asserted as defining the database itself -> FALSE.	Response for Questionnaire / interviewAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cognitive testing Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “open cohort study using practices contributing to the QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ No research-grade cognitive test battery is described as part of the database definition -> FALSE.	Response for Cognitive testingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Physical measures Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “routinely collected primary care electronic medical records” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ Anthropometrics may appear in care records but are not a dedicated research physical phenotyping programme for the resource; conservative FALSE.	Response for Physical measuresAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosamples Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ No biobank of stored samples for the core QResearch resource described -> FALSE.	Response for BiosamplesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genomic data Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ No cohort-wide genotyping programme described for core resource -> FALSE.	Response for Genomic dataAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Omics Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ No proteomics/metabolomics layer described for core resource -> FALSE.	Response for OmicsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ No imaging archive described for core resource -> FALSE.	Response for ImagingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Wearable / sensor Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “QResearch database” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ No wearable device data stream described for core resource -> FALSE.	Response for Wearable / sensorAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Digital phenotyping Recommended	No	Field-cited	Hippisley-Cox et al. The performance of seven QPrediction risk scores… (BMJ Open 2014) https://doi.org/10.1136/bmjopen-2014-005809 Section: Abstract context “electronic medical records” Page: https://pubmed.ncbi.nlm.nih.gov/25168040/ Routine coded records are not passive smartphone digital phenotyping per data-dictionary -> FALSE.	Response for Digital phenotypingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Linked health records Recommended	No	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Data dictionary rule application “QResearch is a large consolidated database derived from the anonymised health records” Page: https://www.qresearch.org/ Per data-dictionary FALSE-when rule for resources that are themselves NHS/GP health-record systems; internal linkages are captured with has_nhs_linkage/has_death_registry_linkage.	Response for Linked health recordsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosample types Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: Core database is electronic records; no biosample types array applicable.	Response for Biosample typesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genotyping platform Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No genotyping platform for core QResearch resource.	Response for Genotyping platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging modalities Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No imaging modalities for core resource.	Response for Imaging modalitiesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Mental health measures Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: Resource is not centred on a fixed named instrument list; studies vary by coded diagnoses/medications.	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 subcategories Recommended List key data subcategories using distinct rows for category markers, named questionnaire/interview instruments, biospecimen types, omics/genomics data products, imaging modalities, sensor streams, and linked-record types.	No value held	No source yet	No citation linked to this field yet.	Response for Data subcategoriesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Field

Current value

Evidence

Source evidence

Response

Notes / correction

Data subcategories

Recommended

List key data subcategories using distinct rows for category markers, named questionnaire/interview instruments, biospecimen types, omics/genomics data products, imaging modalities, sensor streams, and linked-record types.

No value held

No source yet

No citation linked to this field yet.

AccurateNeeds correctionNot sureDoes not apply

Consent and use permissions

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

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Consent and use permissions Recommended Confirm health/biomedical research use, industry/commercial consideration, non-commercial restrictions, governance modifiers, recontact, trial approach, biosample use, linkage, sharing, international transfer, and any Section 251/CAG support.	No value held	No source yet	No citation linked to this field yet.	Response for Consent and use permissionsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Field

Current value

Evidence

Source evidence

Response

Notes / correction

Consent and use permissions

Recommended

Confirm health/biomedical research use, industry/commercial consideration, non-commercial restrictions, governance modifiers, recontact, trial approach, biosample use, linkage, sharing, international transfer, and any Section 251/CAG support.

No value held

No source yet

No citation linked to this field yet.

AccurateNeeds correctionNot sureDoes not apply

Access pathways

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

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Access pathways Recommended Confirm all data access pathways, including route, access level, TRE/SDE or download/API environment, DAC review, collaboration requirements, data sharing agreements, output checking, timelines, and fees.	No value held	No source yet	No citation linked to this field yet.	Response for Access pathwaysAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Field

Current value

Evidence

Source evidence

Response

Notes / correction

Access pathways

Recommended

Confirm all data access pathways, including route, access level, TRE/SDE or download/API environment, DAC review, collaboration requirements, data sharing agreements, output checking, timelines, and fees.

No value held

No source yet

No citation linked to this field yet.

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
Within-cohort coverage metrics Recommended Provide numerator, denominator, unit type, numerator/denominator exactness qualifiers, denominator type, basis, date/release, original source wording, and whether each metric is marginal, joint, conditional, or a release total.	No value held	No source yet	No citation linked to this field yet.	Response for Within-cohort coverage metricsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Field

Current value

Evidence

Source evidence

Response

Notes / correction

Within-cohort coverage metrics

Recommended

Provide numerator, denominator, unit type, numerator/denominator exactness qualifiers, denominator type, basis, date/release, original source wording, and whether each metric is marginal, joint, conditional, or a release total.

No value held

No source yet

No citation linked to this field yet.

AccurateNeeds correctionNot sureDoes not apply

Linkage and access

Field	Current value	Evidence	Source evidence	Response	Notes / correction
NHS linkage Recommended	Yes	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Special Features “the entire database has been linked to cause of death data, cancer and hospital data at individual patient level with linkages extending back as far as 1993.” Page: https://www.qresearch.org/	Response for NHS linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
GP linkage Recommended	No	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “QResearch is a large consolidated database derived from the anonymised health records of over 40 million patients.” Page: https://www.qresearch.org/ Native GP-derived EHR (not an external GP linkage bolt-on to a separate research cohort) -> has_gp_linkage=FALSE, matching CPRD-style interpretation.	Response for GP linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Death registry linkage Recommended	Yes	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Special Features “linked to cause of death data, cancer and hospital data at individual patient level” Page: https://www.qresearch.org/	Response for Death registry linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Education linkage Recommended	No	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Information for Researchers — Linked NHS Digital data “Linked NHS Digital data for Hospital Episode Statistics (HES) Death Register, Cancer Registry data, COVID infection and COVID vaccination data” Page: https://www.qresearch.org/information/information-for-researchers/ Reviewed researcher-facing linkage list; no education/DfE linkage named -> FALSE.	Response for Education linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access mechanism Recommended	tre	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Ethics and Confidentiality “The linked data are only available on servers at Queen Mary University of London” Page: https://www.qresearch.org/about/ethics-and-confidentiality/ Remote controlled analysis / extract delivery via governed QWeb pathway -> tre.	Response for Data access mechanismAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TRE platform Recommended	QWeb (QMUL isolated research servers)	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Ethics and Confidentiality “The research computers are dedicated isolated computers (i.e. it is not linked to the NHSnet or external networks). These computers are the single point of access to the data collected by QResearch.” Page: https://www.qresearch.org/about/ethics-and-confidentiality/ Combined with QWeb application portal referenced on Information for Researchers page -> 'QWeb (QMUL isolated research servers)'.	Response for TRE platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data dictionary URL Recommended	https://www.qresearch.org/guides/	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Guides “Using ICD-10 Clinical Codes to Build a New Code Group” Page: https://www.qresearch.org/guides/ Canonical public documentation hub for variable/code definitions and QWeb workflows.	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 as single integer: Information for Researchers states extraction is normally ~6 weeks but end-to-end varies by project.	Response for Data access timeline (days)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access cost Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: Costs described as self-funding model on home page without a single numeric fee in reviewed snippets.	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	No value held	Not published	Searched — not published UNSOURCEABLE: No current cohort-wide age JSON published on reviewed qresearch.org pages or abstracts used in this pass.	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 cohort-wide sex distribution JSON on reviewed qresearch.org pages.	Response for Sex distributionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ethnicity distribution Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No cohort-wide ethnicity JSON on reviewed qresearch.org pages.	Response for Ethnicity distributionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Smoking status distribution Recommended	No value held	No source yet	No citation linked to this field yet.	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: No single median age for the full dynamic QResearch population on reviewed pages.	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: No single current percent female for the full population on reviewed pages.	Response for Percent femaleAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Percent non-white Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: No single current diversity percentage for the full population on reviewed pages.	Response for Percent non-whiteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Geographic coverage Recommended	national	Field-cited	QResearch — Official Website https://www.qresearch.org/ Section: Home “The practices are spread throughout the UK” Page: https://www.qresearch.org/ UK-wide practice footprint -> national.	Response for Geographic coverageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Follow-up duration Recommended	No value held	Not published	Searched — not published UNSOURCEABLE as single bucket: home page states records back to 1989 but follow-up varies by patient registration periods.	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: Continuously updated resource without one cohort-wide last collection date on reviewed pages.	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: Not a discrete recruited cohort with one start date.	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: Not applicable.	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: Schizophrenia Recommended Confirm this diagnosis area applies and estimated N if shown.	Schizophrenia · Psychotic Disorders	Field-cited	Ranger et al. Preexisting Neuropsychiatric Conditions and Associated Risk… (JAMA Psychiatry 2023) https://doi.org/10.1001/jamapsychiatry.2022.3614 Section: DESIGN, SETTING, AND PARTICIPANTS “Prepandemic (2015-2020) and contemporary (2020-2021) longitudinal cohorts were derived from the QResearch database of English primary care records.” Page: https://pubmed.ncbi.nlm.nih.gov/36350602/ Exposure includes psychotic disorders in this QResearch mental health paper; row retained with estimated_n NULL (no aggregate count).	Response for Diagnosis area: SchizophreniaAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Bipolar disorder Recommended Confirm this diagnosis area applies and estimated N if shown.	Bipolar disorder · Mood Disorders	Field-cited	Ranger et al. Preexisting Neuropsychiatric Conditions and Associated Risk… (JAMA Psychiatry 2023) https://doi.org/10.1001/jamapsychiatry.2022.3614 Section: EXPOSURES “Diagnosis of and/or medication for anxiety, mood, or psychotic disorders and diagnosis of dementia, depression, schizophrenia, or bipolar” Page: https://pubmed.ncbi.nlm.nih.gov/36350602/ Explicit bipolar mood disorder exposure in QResearch analysis; estimated_n NULL.	Response for Diagnosis area: Bipolar disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Major depressive disorder Recommended Confirm this diagnosis area applies and estimated N if shown.	Major depressive disorder · Mood Disorders	Field-cited	Ranger et al. Preexisting Neuropsychiatric Conditions and Associated Risk… (JAMA Psychiatry 2023) https://doi.org/10.1001/jamapsychiatry.2022.3614 Section: EXPOSURES “Diagnosis of and/or medication for anxiety, mood, or psychotic disorders and diagnosis of dementia, depression, schizophrenia, or bipolar” Page: https://pubmed.ncbi.nlm.nih.gov/36350602/ Depression/mood strand explicitly studied using QResearch; estimated_n NULL.	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	Ranger et al. Preexisting Neuropsychiatric Conditions and Associated Risk… (JAMA Psychiatry 2023) https://doi.org/10.1001/jamapsychiatry.2022.3614 Section: EXPOSURES “Diagnosis of and/or medication for anxiety, mood, or psychotic disorders” Page: https://pubmed.ncbi.nlm.nih.gov/36350602/ Anxiety disorders explicitly in exposure set; estimated_n NULL.	Response for Diagnosis area: Generalised anxiety disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes

Linked sites

Sites contributing participants or data to this cohort.

Field	Current value	Evidence	Source evidence	Response	Notes / correction
Linked sites Optional	No value held	No source yet	No citation linked to this field yet.	Response for Linked sitesAccurateNeeds 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	16 Apr 2026	Internal	Internal catalogue field	—	—
Data source Recommended	Verified Apr 2026 from qresearch.org (home, about, ethics, information for researchers, guides), PubMed PMID 25168040, PubMed PMID 36350602, Google Scholar search snapshot, HDR UK Gateway search snapshot, ClinicalTrials.gov search snapshot, ISRCTN API query (0 trials), DPUK Data Portal snapshot	Internal	Internal catalogue field	—	—