Cohort validation pack

NHS SDE

NHS Secure Data Environment

Generated 6 Oct 2026, 10:36 · ID 21

Unverified

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	41 of 70 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	NHS SDE	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: Page heading “Secure Data Environment” Page: https://digital.nhs.uk/services/secure-data-environment-service	Response for Short nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Full name Required	NHS Secure Data Environment	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: Meta description “The NHS England Secure Data Environment (SDE) is a secure data and research analysis platform” Page: https://digital.nhs.uk/services/secure-data-environment-service	Response for Full nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Managing organisation Recommended	NHS England	Field-cited	NHS England Digital — Mental Health Services Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Section: Page title “Mental Health Services Data Set (MHSDS) - NHS England Digital” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set	Response for Managing organisationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Primary site Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: NHS SDE is a national platform service with no single lead trial site represented in the sites table.	Response for Primary siteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Website URL Recommended	https://digital.nhs.uk/services/secure-data-environment-service	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: URL “https://digital.nhs.uk/services/secure-data-environment-service” Page: https://digital.nhs.uk/services/secure-data-environment-service	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: Service pages expose generic support channels but no single named cohort contact.	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 cohort contact email was available in captured page text for this specific cohort record.	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 NHS Secure Data Environment providing access to de-identified health records for approved research via a Trusted Research Environment. Includes the Mental Health Services Data Set (MHSDS), Hospital Episode Statistics (HES), and other national datasets.	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: Summary “The Secure Data Environment (SDE) is a secure data and research analysis platform. It is part of an interoperable NHS Research Secure Data Environment network.” Page: https://digital.nhs.uk/services/secure-data-environment-service	Response for DescriptionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N Required	1,358,959	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Population Size “Population Size 1,358,959” Page: https://healthdatagateway.org/en/dataset/863	Response for Total NAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N qualifier Recommended	approximate	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Population Size “Population Size 1,358,959” Page: https://healthdatagateway.org/en/dataset/863 Set to approximate because the public card is a metadata snapshot for MHSDS and may vary by extraction window.	Response for Total N qualifierAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Year established Recommended	No value held	Not published	Searched — not published UNSOURCEABLE: Reviewed public pages describe the service as new but do not provide a single canonical establishment year for this cohort entry.	Response for Year establishedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Active cohort Recommended	Yes	Field-cited	NHS England Digital — Secure Data Environment introduction https://digital.nhs.uk/services/secure-data-environment-service/introduction Section: Service description “The SDE is a service that provides approved users from trusted organisations with timely and secure access to health and care data.” Page: https://digital.nhs.uk/services/secure-data-environment-service/introduction	Response for Active cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ongoing recruitment Recommended	No	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: Service scope “This service gives approved researchers with approved projects secure access to NHS data.” Page: https://digital.nhs.uk/services/secure-data-environment-service NHS SDE is a data access platform and does not recruit participants directly; ongoing_recruitment=FALSE.	Response for Ongoing recruitmentAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Refreshed cohort Recommended	Yes	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Details “Publishing frequency Monthly” Page: https://healthdatagateway.org/en/dataset/863 Monthly publication indicates ongoing data refresh cadence.	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 metric is applicable/published for NHS SDE public metadata.	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 rates are not defined for this continuously refreshed administrative dataset.	Response for Retention rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Published references Recommended	10.1136/bmj.n826	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Citation line “BMJ 2021;372:n826 \| doi: 10.1136/bmj.n826” Page: https://doi.org/10.1136/bmj.n826	Response for Published referencesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Notes Recommended	Routine EHR data. National coverage. Opt-out consent model. Access via TRE application. MHSDS covers all patients in contact with MH services in England (mandatory submission for NHS-funded care). Total NHS records much larger; figure represents estimated MH-relevant records.	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: Service description “This service gives approved researchers with approved projects secure access to NHS data.” Page: https://digital.nhs.uk/services/secure-data-environment-service	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	1 — Anonymised / no consent	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: How data is accessed “de-identified (pseudonymised), so that any identifying (or personal) patient information such as names, addresses or NHS numbers are replaced with artificial, or 'pseudo', information” Page: https://digital.nhs.uk/services/secure-data-environment-service Step 1 identifiable=NO for researchers (de-identified pseudonymised records with no direct identifiers exposed). Therefore consent_level=1 per data-dictionary decision tree.	Response for Consent level (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Characterisation depth (axis) Required	1 — Routine EHR	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Summary “The MHSDS includes patient level clinical and administrative data for patients, who are in contact with NHS funded mental health services in England.” Page: https://healthdatagateway.org/en/dataset/863 Routine service EHR data only; no research-grade psychiatric interview battery described. Decision tree: L1 yes routine EHR, L2 validated research instruments not evidenced -> 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	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: Data architecture “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 DERIVED per formula: hasResearch=FALSE, hasBiological=FALSE, hasAdvanced=FALSE (all 10 modality flags FALSE for this cohort record). Therefore 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). De-identified national health records resource accessed via a TRE; not a recruited cohort.	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 — Secure Data Environment introduction https://digital.nhs.uk/services/secure-data-environment-service/introduction Section: Access model “provides approved researchers from trusted organisations with secure access to health and care data” Page: https://digital.nhs.uk/services/secure-data-environment-service/introduction No participant-level active interventional consent/randomisation framework is described for this administrative resource; 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	NHS England Digital — Mental Health Services Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Section: About MHSDS “The Mental Health Services Data Set (MHSDS) is a patient level, output based secondary uses data set” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set No cohort-specific validated participant questionnaire battery evidenced; routine secondary-use service data only -> FALSE.	Response for Questionnaire / interviewAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cognitive testing Recommended	No	Field-cited	NHS England Digital — Mental Health Services Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Section: About MHSDS “patient level, output based secondary uses data set” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set No dedicated cognitive testing modality described -> FALSE.	Response for Cognitive testingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Physical measures Recommended	No	Field-cited	NHS England Digital — Mental Health Services Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Section: About MHSDS “patient level, output based secondary uses data set” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set No research protocol for direct physical measures collection is described for this cohort resource -> FALSE.	Response for Physical measuresAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosamples Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “The data sources currently available include primary care data, hospital episodes ... registered deaths ... laboratory tests ... and community dispensed medicines” Page: https://doi.org/10.1136/bmj.n826 No biobanked biosample repository described for the NHS SDE cohort resource -> FALSE.	Response for BiosamplesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genomic data Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “The data sources currently available include primary care data, hospital episodes ... registered deaths ... laboratory tests ... and community dispensed medicines” Page: https://doi.org/10.1136/bmj.n826 No genotyping or sequencing modality described in this cohort resource -> FALSE.	Response for Genomic dataAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Omics Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “The data sources currently available include primary care data, hospital episodes ... registered deaths ... laboratory tests ... and community dispensed medicines” Page: https://doi.org/10.1136/bmj.n826 No non-genomic omics panels described for the cohort resource -> FALSE.	Response for OmicsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “The data sources currently available include primary care data, hospital episodes ... registered deaths ... laboratory tests ... and community dispensed medicines” Page: https://doi.org/10.1136/bmj.n826 No imaging modality archive is explicitly listed -> FALSE.	Response for ImagingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Wearable / sensor Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “linked, person level EHR data from national health settings” Page: https://doi.org/10.1136/bmj.n826 No wearable sensor stream described -> FALSE.	Response for Wearable / sensorAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Digital phenotyping Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “linked, person level EHR data from national health settings” Page: https://doi.org/10.1136/bmj.n826 No passive smartphone/device behavioural phenotyping modality is described -> FALSE.	Response for Digital phenotypingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Linked health records Recommended	No	Field-cited	NHS England Digital — Mental Health Services Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Section: Scope “The Mental Health Services Data Set (MHSDS) is a patient level, output based secondary uses data set” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Per data-dictionary rule for national NHS datasets, this umbrella flag remains FALSE; linkage specifics are captured in has_nhs_linkage/has_gp_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: No biosample archive described; field remains NULL.	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 genomics platform information available; field remains NULL.	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 modality archive described; field remains NULL.	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: No named validated research instrument list for this administrative resource was published in reviewed sources.	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	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “linked, person level EHR data from national health settings” Page: https://doi.org/10.1136/bmj.n826	Response for NHS linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
GP linkage Recommended	Yes	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Participants and data sources “54.4 million people alive on 1 January 2020 and registered with an NHS general practitioner in England.” Page: https://doi.org/10.1136/bmj.n826	Response for GP linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Death registry linkage Recommended	Yes	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Setting “EHRs from primary care, hospital episodes, death registry, covid-19 laboratory test results, and community dispensing data.” Page: https://doi.org/10.1136/bmj.n826	Response for Death registry linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Education linkage Recommended	No	Field-cited	Wood et al. 2021 — Linked EHRs for >54 million people in England https://doi.org/10.1136/bmj.n826 Section: Data resources “The data sources currently available include primary care data, hospital episodes ... registered deaths ... laboratory tests ... and community dispensed medicines” Page: https://doi.org/10.1136/bmj.n826 Education data is not listed among linked NHS SDE resources in reviewed evidence; has_education_linkage=FALSE.	Response for Education linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access mechanism Recommended	tre	Field-cited	NHS England Digital — Data Access Request Service (DARS) https://digital.nhs.uk/services/data-access-request-service-dars Section: How to access our data “Once your DARS application has been approved, data will be made available either by secure electronic file transfer or through the National Secure Data Environment.” Page: https://digital.nhs.uk/services/data-access-request-service-dars Access is via TRE/SDE application pathway -> data_access_mechanism=tre.	Response for Data access mechanismAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TRE platform Recommended	NHS England Secure Data Environment	Field-cited	NHS England Digital — Secure Data Environment introduction https://digital.nhs.uk/services/secure-data-environment-service/introduction Section: Intro paragraph “NHS England’s Secure Data Environment (SDE) is a Trusted Research Environment (TRE)” Page: https://digital.nhs.uk/services/secure-data-environment-service/introduction	Response for TRE platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data dictionary URL Recommended	https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set	Field-cited	NHS England Digital — Mental Health Services Data Set https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set Section: Page title “Mental Health Services Data Set (MHSDS) - NHS England Digital” Page: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set	Response for Data dictionary URLAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access timeline (days) Recommended	120	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Data Access Request “Time to dataset access 2-6 months” Page: https://healthdatagateway.org/en/dataset/863 Converted published 2-6 month window to midpoint 120 days for integer timeline field.	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: Public pages indicate DARS charges exist but do not provide a stable cohort-specific fixed tariff in captured evidence.	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 age-band distribution published for the NHS SDE cohort abstraction in reviewed public metadata.	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 sex-distribution table published for this cohort abstraction in reviewed public metadata.	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-level ethnicity distribution summary was provided on the reviewed SDE/MHSDS metadata 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: Median age for the NHS SDE cohort abstraction is not publicly reported in 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: Female share not publicly provided for this cohort abstraction in reviewed sources.	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: Ethnicity percentage breakdowns are not published on reviewed NHS SDE/MHSDS metadata pages.	Response for Percent non-whiteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Geographic coverage Recommended	national	Field-cited	NHS England Digital — Secure Data Environment service page https://digital.nhs.uk/services/secure-data-environment-service Section: National platform context “The NHS England SDE provides access to many NHS data sets” Page: https://digital.nhs.uk/services/secure-data-environment-service NHS England service and datasets imply national England coverage; DIGIT taxonomy maps this to national.	Response for Geographic coverageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Follow-up duration Recommended	1-10 years	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Coverage “Start date 01/01/2016 End date 31/03/2024” Page: https://healthdatagateway.org/en/dataset/863 Coverage window spans about 8 years, mapped to followup_duration=1-10 years.	Response for Follow-up durationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Last data collection date Recommended	31 Mar 2024	Field-cited	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Coverage “End date 31/03/2024” Page: https://healthdatagateway.org/en/dataset/863	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 participant recruitment cohort; no recruitment start date published.	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 a participant recruitment cohort; no recruitment end date published.	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	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Documentation “robust, comprehensive, nationally consistent and comparable person-based information for children, young people and adults who are in contact with mental health services located in England.” Page: https://healthdatagateway.org/en/dataset/863 Schizophrenia row retained as severe mental illness category represented in secondary MH services scope; diagnosis-specific N not publicly published -> estimated_n NULL.	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	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Documentation “children, young people and adults who are in contact with mental health services located in England.” Page: https://healthdatagateway.org/en/dataset/863 Bipolar disorder row retained as core mood-disorder service area; diagnosis-specific N not publicly published -> 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	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Summary “The MHSDS includes patient level clinical and administrative data for patients, who are in contact with NHS funded mental health services in England.” Page: https://healthdatagateway.org/en/dataset/863 Major depressive disorder row retained as represented condition family; diagnosis-specific N not publicly published -> 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	HDR UK Gateway — Mental Health Services Data Set https://healthdatagateway.org/en/dataset/863 Section: Summary “patients, who are in contact with NHS funded mental health services in England” Page: https://healthdatagateway.org/en/dataset/863 Generalised anxiety disorder row retained as represented condition family; diagnosis-specific N not publicly published -> 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	No value held	Internal	Internal catalogue field	—	—
Data source Recommended	NHS England SDE service pages, HDR UK Gateway MHSDS metadata, and BMJ data resource paper (Wood et al., 2021).	Internal	Internal catalogue field	—	—