Cohort validation pack

IAPT / Talking Therapies

Improving Access to Psychological Therapies (IAPT) Data Set

Generated 6 Oct 2026, 10:35 · ID 46

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	42 of 71 reviewable fields are cited to a source (59%) · 8 with no source yet · 21 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	IAPT / Talking Therapies	Field-cited	NHS England Digital — Improving Access to Psychological Therapies (IAPT) Data Set (hub) https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set Section: HTML title / hub “Improving Access to Psychological Therapies (IAPT) Data Set - NHS England Digital” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set DIGIT display name IAPT / Talking Therapies aligns with NHS Digital hub title and NHS England Talking Therapies rebrand described on the IAPT data set pages.	Response for Short nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Full name Required	Improving Access to Psychological Therapies (IAPT) Data Set	Field-cited	NHS England Digital — Improving Access to Psychological Therapies (IAPT) Data Set (hub) https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set Section: HTML title “Improving Access to Psychological Therapies (IAPT) Data Set - NHS England Digital” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set	Response for Full nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Managing organisation Recommended	NHS England	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Page branding “NHS England Digital” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about National NHS England Digital collection; managing_organisation set to NHS England per DIGIT catalogue convention (publisher is NHS England Digital).	Response for Managing organisationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Primary site Recommended	No value held	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about National all-England administrative extract; not anchored to a single recruiting research site → primary_site_id NULL.	Response for Primary siteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Website URL Recommended	https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set	Field-cited	NHS England Digital — Improving Access to Psychological Therapies (IAPT) Data Set (hub) https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set Section: Canonical hub URL “Improving Access to Psychological Therapies (IAPT) Data Set - NHS England Digital” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set	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 dataset contact published on reviewed NHS Digital 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: no stable public mailbox for the dataset identified on reviewed NHS Digital pages.	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	National patient-level secondary-uses dataset for NHS Talking Therapies (formerly IAPT) in England: mandatory monthly submissions from NHS-funded psychological therapy services since April 2012. The programme began in 2008. Official statistics report national referral throughput (for example 1.76 million referrals in 2022-23). Peer-reviewed work on IAPT routine records uses session-by-session Patient Health Questionnaire 9 (PHQ-9) and Generalised Anxiety Disorder 7 (GAD-7) scores alongside other national reporting measures.	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Background; How the IAPT data set is used “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Combined with programme start year, collection start date, annual referral headline statistic, and Bone et al. 2021 Methods abstract on PHQ-9/GAD-7 in IAPT records.	Response for DescriptionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N Required	1,760,000	Field-cited	NHS England Digital — NHS Talking Therapies annual statistical publication (2022-23) https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23 Section: Highlights infographic “1.76 million referrals to NHS Talking Therapies” Page: https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23 Mapped to integer 1760000 referrals in 2022-23 financial year.	Response for Total NAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N qualifier Recommended	per_year_intake	Field-cited	NHS England Digital — NHS Talking Therapies annual statistical publication (2022-23) https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23 Section: Highlights + methodological note “Please note that that these numbers reflect activity in the year and are not all based on the same group of referrals.” Page: https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23 Figure is FY referral throughput, not a closed cohort denominator → total_n_qualifier=per_year_intake per data-dictionary.md.	Response for Total N qualifierAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Year established Recommended	2008	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Improving Access to Psychological Therapies (IAPT) programme “The adult Improving Access to Psychological Therapies (IAPT) programme began in the NHS in 2008 and has transformed the treatment of anxiety disorders and depression in adults in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about	Response for Year establishedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Active cohort Recommended	Yes	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “This national data set has been collected since April 2012 and is a mandatory submission for all NHS funded care, including care delivered by independent sector healthcare providers.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Ongoing mandatory national collection → is_active=TRUE.	Response for Active cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ongoing recruitment Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Mandatory operational collection “This national data set has been collected since April 2012 and is a mandatory submission for all NHS funded care” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Not a named prospective study recruiting participants into a trial cohort in the DIGIT sense → ongoing_recruitment=FALSE.	Response for Ongoing recruitmentAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Refreshed cohort Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Mandatory operational collection “This national data set has been collected since April 2012 and is a mandatory submission for all NHS funded care” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Repeated provider submissions differ from longitudinal cohort re-phenotyping waves in the DIGIT sense → is_refreshed=FALSE.	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: not applicable / not published for secondary-use administrative flows.	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: cohort retention metric not published on reviewed pages for this resource type.	Response for Retention rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Published references Recommended	10.1016/S2589-7500(21)00018-2	Field-cited	Bone et al. 2021 — Dynamic prediction of psychological treatment outcomes (Lancet Digital Health) https://doi.org/10.1016/S2589-7500(21)00018-2 Section: ArticleIdList “10.1016/S2589-7500(21)00018-2” Page: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=33766287&retmode=xml Primary literature demonstrating structure of routinely collected IAPT symptom measures used in research.	Response for Published referencesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Notes Recommended	Services were rebranded as NHS Talking Therapies for anxiety and depression while the data set remains the IAPT data set pending a formal uplift (NHS Digital, 2023). Access for approved research is typically via the NHS England Secure Data Environment alongside other national governance routes.	Field-cited	NHS England Digital — Improving Access to Psychological Therapies (IAPT) Data Set (hub) https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set Section: New name for IAPT services “Following an extensive engagement process, NHS England national mental health team has recently announced a new name for Improving Access to Psychological Therapies (IAPT) services: NHS Talking Therapies” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set Notes field combines rebrand context with SDE access context (see SDE provenance row for access sentence). NHS England Digital — Secure Data Environment service https://digital.nhs.uk/services/secure-data-environment-service Section: SDE service summary “The NHS England SDE provides access to many NHS data sets including Hospital Episodes, Emergency Care, Maternity, Mental health data sets and more.” Page: https://digital.nhs.uk/services/secure-data-environment-service Second provenance row for notes: SDE access route for approved researchers (mental health data sets explicitly listed).	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	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set (secondary uses) “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Step 1 identifiable patient-level records YES. Step 2 national secondary-uses collection without individual research consent for each secondary analysis → consent_level 2 (Section 251 / CAG style access) per data-dictionary.md. Steps 3–4 (recontact / interventional consent) do not apply to public SDE access model.	Response for Consent level (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Characterisation depth (axis) Required	2 — Standardised MH instruments	Field-cited	Bone et al. 2021 — Dynamic prediction of psychological treatment outcomes (Lancet Digital Health) https://doi.org/10.1016/S2589-7500(21)00018-2 Section: PubMed Abstract / METHODS “patient-reported depression (Patient Health Questionnaire 9 [PHQ-9]) and anxiety (Generalised Anxiety Disorder 7 [GAD-7]) symptom measures obtained on a session-by-session basis” Page: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=33766287&retmode=xml Routine validated depression/anxiety scales collected longitudinally in IAPT records → characterisation_depth 2 (standardised MH instruments) per data-dictionary.md; not SCID-grade interview cohort (4).	Response for Characterisation depth (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data availability (axis) Required	2 — Records + research data	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Derivation (data-dictionary.md) “The IAPT data set provides a comprehensive national picture of the use of IAPT services in England and supports a variety of secondary use functions such as:” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about DERIVED: hasResearch=TRUE via has_questionnaire_data (PHQ-9/GAD-7 evidenced in Bone et al. PubMed abstract); hasBiological=FALSE; hasAdvanced=FALSE → data_availability score 2.	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). National administrative dataset of NHS Talking Therapies (IAPT) patients.	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	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Secondary uses framing “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about TWiCs-eligible requires consent_level 4 per data-dictionary.md; this resource is consent_level 2 → 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	Yes	Field-cited	Bone et al. 2021 — Dynamic prediction of psychological treatment outcomes (Lancet Digital Health) https://doi.org/10.1016/S2589-7500(21)00018-2 Section: PubMed Abstract / METHODS “patient-reported depression (Patient Health Questionnaire 9 [PHQ-9]) and anxiety (Generalised Anxiety Disorder 7 [GAD-7]) symptom measures obtained on a session-by-session basis” Page: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=33766287&retmode=xml	Response for Questionnaire / interviewAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cognitive testing Recommended	No	Field-cited	Bone et al. 2021 — Dynamic prediction of psychological treatment outcomes (Lancet Digital Health) https://doi.org/10.1016/S2589-7500(21)00018-2 Section: PubMed Abstract / METHODS “patient-reported depression (Patient Health Questionnaire 9 [PHQ-9]) and anxiety (Generalised Anxiety Disorder 7 [GAD-7]) symptom measures obtained on a session-by-session basis” Page: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=33766287&retmode=xml Reviewed evidence names self-report mood/anxiety scales only; no named neuropsychological cognitive battery (e.g. CANTAB) → has_cognitive_data=FALSE per data-dictionary.md.	Response for Cognitive testingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Physical measures Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about No anthropometry/vitals research panel described on reviewed pages → has_physical_measures=FALSE.	Response for Physical measuresAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosamples Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about National psychological therapy administrative collection; no biobank component on reviewed pages → has_biosamples=FALSE.	Response for BiosamplesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genomic data Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about No genotyping/sequencing component on reviewed pages → has_genomic_data=FALSE.	Response for Genomic dataAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Omics Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about No omics assays described on reviewed pages → has_omics_data=FALSE.	Response for OmicsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about No neuroimaging acquisition described on reviewed pages → has_imaging_data=FALSE.	Response for ImagingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Wearable / sensor Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about No wearable sensor streams described on reviewed pages → has_wearable_data=FALSE.	Response for Wearable / sensorAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Digital phenotyping Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about No passive smartphone sensor phenotyping described on reviewed pages; ROM questionnaires are active completion, not digital phenotyping in the DIGIT sense → has_digital_phenotyping=FALSE.	Response for Digital phenotypingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Linked health records Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about DIGIT data-dictionary.md: has_linked_health_records=FALSE when the cohort is itself an NHS administrative dataset (use has_nhs_linkage instead).	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: NULL array; no biosample types on reviewed pages.	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: NULL; no genotyping platform on reviewed pages.	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: NULL array; no imaging modalities on reviewed pages.	Response for Imaging modalitiesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Mental health measures Recommended	PHQ-9, GAD-7	Field-cited	Bone et al. 2021 — Dynamic prediction of psychological treatment outcomes (Lancet Digital Health) https://doi.org/10.1016/S2589-7500(21)00018-2 Section: PubMed Abstract / METHODS “patient-reported depression (Patient Health Questionnaire 9 [PHQ-9]) and anxiety (Generalised Anxiety Disorder 7 [GAD-7]) symptom measures obtained on a session-by-session basis” Page: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=33766287&retmode=xml DIGIT array lists PHQ-9 and GAD-7 as explicitly evidenced ROMs; additional IAPT ADSMs may exist in technical outputs—human reviewer may extend from DAPB1520 data dictionary if needed.	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	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Dataset is NHS England patient-level NHS psychological therapy services data → has_nhs_linkage=TRUE.	Response for NHS linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
GP linkage Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set summary “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Guaranteed longitudinal GP record linkage for this DIGIT row not evidenced on reviewed summary pages → has_gp_linkage remains default FALSE.	Response for GP linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Death registry linkage Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set summary “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about ONS mortality linkage not asserted on reviewed summary for this catalogue row → FALSE.	Response for Death registry linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Education linkage Recommended	No	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT data set summary “The IAPT data set was developed with the IAPT programme as a patient level, output based, secondary uses data set which aims to deliver robust, comprehensive, nationally consistent and comparable information for patients accessing NHS-funded IAPT services in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Education sector linkage not asserted on reviewed summary for this catalogue row → FALSE.	Response for Education linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access mechanism Recommended	tre	Field-cited	NHS England Digital — Secure Data Environment service https://digital.nhs.uk/services/secure-data-environment-service Section: Service summary body “The NHS England SDE provides access to many NHS data sets including Hospital Episodes, Emergency Care, Maternity, Mental health data sets and more.” Page: https://digital.nhs.uk/services/secure-data-environment-service Approved researcher access via NHS England Secure Data Environment → data_access_mechanism=tre.	Response for Data access mechanismAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TRE platform Recommended	NHS Secure Data Environment	Field-cited	NHS England Digital — Secure Data Environment service https://digital.nhs.uk/services/secure-data-environment-service Section: meta description (page head) “The NHS England Secure Data Environment (SDE) is a secure data and research analysis platform, allowing approved professional to get access to NHS data.” Page: https://digital.nhs.uk/services/secure-data-environment-service Human-readable TRE label harmonised with other DIGIT national NHS rows: NHS Secure Data Environment.	Response for TRE platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data dictionary URL Recommended	https://digital.nhs.uk/data-and-information/information-standards/governance/latest-activity/standards-and-collections/dapb-1520-improving-access-to-psychological-therapies-data-set	Field-cited	NHS England Digital — DAPB1520: Improving Access to Psychological Therapies Data Set https://digital.nhs.uk/data-and-information/information-standards/governance/latest-activity/standards-and-collections/dapb-1520-improving-access-to-psychological-therapies-data-set Section: Page summary “DAPB1520: Improving Access to Psychological Therapies Data Set” Page: https://digital.nhs.uk/data-and-information/information-standards/governance/latest-activity/standards-and-collections/dapb-1520-improving-access-to-psychological-therapies-data-set data_dictionary_url points to NHS Digital DAPB1520 information standard page for the IAPT data set.	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 in this pass: DARS/SDE application timelines not extracted to a single integer.	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 in this pass: fee schedule not quoted from reviewed NHS Digital pages.	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 in this pass: no JSON age bands extracted from reviewed NHS Digital HTML sections; annual statistics pages contain charts not transcribed here.	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 in this pass: no sex split JSON extracted from reviewed HTML sections used.	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 in this pass: no ethnicity JSON extracted from reviewed HTML sections used.	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 in this pass: median age not taken from reviewed summary text blocks.	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 in this pass: percent female not taken from reviewed summary text blocks.	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 in this pass: ethnicity percentages not taken from reviewed summary text blocks.	Response for Percent non-whiteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Geographic coverage Recommended	national	Field-cited	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: IAPT programme “The adult Improving Access to Psychological Therapies (IAPT) programme began in the NHS in 2008 and has transformed the treatment of anxiety disorders and depression in adults in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about England-only programme scope on reviewed page → geographic_coverage=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 in this pass: no single follow-up duration string for the national dataset on reviewed summary pages.	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 in this pass: rolling monthly submissions mean no single last_data_collection_date taken from reviewed static 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: administrative collection dates differ from study recruitment_start_date semantics; field left NULL.	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 as a closed cohort recruitment end date.	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	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Improving Access to Psychological Therapies (IAPT) programme “The adult Improving Access to Psychological Therapies (IAPT) programme began in the NHS in 2008 and has transformed the treatment of anxiety disorders and depression in adults in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Major depressive disorder (id=5) is explicit programme scope (depression in adults). UNSOURCEABLE in this pass: no per-condition counts in reviewed HTML excerpts; estimated_n NULL in seed.	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	NHS England Digital — About the Improving Access to Psychological Therapies (IAPT) Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Section: Improving Access to Psychological Therapies (IAPT) programme “The adult Improving Access to Psychological Therapies (IAPT) programme began in the NHS in 2008 and has transformed the treatment of anxiety disorders and depression in adults in England.” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/improving-access-to-psychological-therapies-data-set/about Generalised anxiety disorder (id=8) is representative core GAD-range anxiety coverage within programme scope. UNSOURCEABLE in this pass: no per-condition counts in reviewed HTML excerpts; estimated_n NULL in seed.	Response for Diagnosis area: Generalised anxiety disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Social anxiety disorder Recommended Confirm this diagnosis area applies and estimated N if shown.	Social anxiety disorder · Anxiety Disorders	Field-cited	NHS England Digital — NHS Talking Therapies 2022-23 annual report appendices https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23/appendices Section: Appendices narrative “Patients can attend NHS Talking Therapies services with a range of conditions, both mental and physical.” Page: https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23/appendices Social anxiety disorder (id=9) retained as in-scope anxiety variant under stepped-care/NICE pathway context described in appendices. UNSOURCEABLE in this pass: no per-condition counts in reviewed HTML excerpts; estimated_n NULL in seed.	Response for Diagnosis area: Social anxiety disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: OCD Recommended Confirm this diagnosis area applies and estimated N if shown.	OCD · Obsessive-Compulsive	Field-cited	NHS England Digital — NHS Talking Therapies 2022-23 annual report appendices https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23/appendices Section: Appendix A – NICE-recommended IAPT therapies “The National Institute of Health and Care Excellence (NICE) recommends different psychological therapies for specific types of anxiety and depression.” Page: https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23/appendices OCD (id=11) is commonly treated within NHS Talking Therapies NICE-recommended pathways referenced from this appendix page. UNSOURCEABLE in this pass: no per-condition counts in reviewed HTML excerpts; estimated_n NULL in seed.	Response for Diagnosis area: OCDAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: PTSD Recommended Confirm this diagnosis area applies and estimated N if shown.	PTSD · Trauma-Related	Field-cited	NHS England Digital — NHS Talking Therapies 2022-23 annual report appendices https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23/appendices Section: Appendices narrative “Patients can attend NHS Talking Therapies services with a range of conditions, both mental and physical.” Page: https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2022-23/appendices PTSD (id=12) retained as trauma-related anxiety condition that can present within services treating anxiety/depression under NICE pathways; human reviewer may tighten mapping against IAPT problem-descriptor codebook. UNSOURCEABLE in this pass: no per-condition counts in reviewed HTML excerpts; estimated_n NULL in seed.	Response for Diagnosis area: PTSDAccurateNeeds 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 NHS Digital IAPT data set hub and About pages, DAPB1520 information standard page, NHS Digital NHS Talking Therapies 2022-23 annual statistical publication, appendices (problem descriptors / NICE therapies), NHS England adult IAPT programme page, NHS Digital Secure Data Environment service page, Bone et al. 2021 Lancet Digital Health (PubMed XML), DIGIT data-population-plan.md (Group 4 list), ClinicalTrials.gov API v2, ISRCTN API XML (registry hits are interventional studies, not a DIGIT site directory). Google Scholar query "cohort profile" IAPT returned no dedicated cohort-profile paper. DPUK web search returned no standalone IAPT national dataset catalogue entry. HDR UK datasets API path tried in-browser pattern returned HTTP 404.	Internal	Internal catalogue field	—	—