Cohort validation pack

NCISH

National Confidential Inquiry into Suicide and Safety in Mental Health

Generated 6 Oct 2026, 10:36 · ID 49

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	44 of 73 reviewable fields are cited to a source (60%) · 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	NCISH	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: HTML title “NCISH \| The University of Manchester” Page: https://sites.manchester.ac.uk/ncish/	Response for Short nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Full name Required	National Confidential Inquiry into Suicide and Safety in Mental Health	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Home page body “The National Confidential Inquiry into Suicide and Safety in Mental Health (NCISH) is an internationally unique project.” Page: https://sites.manchester.ac.uk/ncish/	Response for Full nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Managing organisation Recommended	The University of Manchester	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — Who is responsible “NCISH and its data are based at The University of Manchester” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ HQIP commissions NCISH; academic host and data controller contact for the programme is stated at The University of Manchester — managing_organisation set accordingly.	Response for Managing organisationAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Primary site Recommended	No value held	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Programme scope “Our study has collected in-depth information on all suicides in the UK since 1996.” Page: https://sites.manchester.ac.uk/ncish/ National confidential enquiry spanning UK providers and registries — not a single-site recruiting cohort → primary_site_id NULL.	Response for Primary siteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Website URL Recommended	https://sites.manchester.ac.uk/ncish/	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Canonical “https://sites.manchester.ac.uk/ncish/” Page: https://sites.manchester.ac.uk/ncish/	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: Searched NCISH data-security page (Subject access / contact email block), NCISH home page, and Annual Report 2023 PDF contact section; no named individual contact suitable for contact_name — only programme email (contact_email).	Response for Contact nameAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Contact email Recommended	ncish@manchester.ac.uk	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — Subject access “Email: ncish@manchester.ac.uk” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/	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	UK-wide confidential enquiry into suicide and safety in mental health services. Collects identifiers from ONS and devolved registries, matches NHS mental health contacts, and obtains detailed clinical information from providers via structured clinician-completed returns. Commissioned by HQIP as part of the Mental Health Clinical Outcome Review Programme; outputs include annual reports and themed analyses.	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — opening “The National Confidential Inquiry into Suicide and Safety in Mental Health (NCISH) is commissioned by the Healthcare Quality Improvement Partnership (HQIP).” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ Combined with the same page on ONS/NRS/NISRA flows, provider matching, and clinician-completed questionnaires after suicide, plus homepage text on UK-wide collection since 1996.	Response for DescriptionAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N Required	6,214	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Key findings — General population suicide numbers and rates “There were 68,357 suicides in the general population in the UK between 2010 and 2020, an average of 6,214 deaths per year.” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831	Response for Total NAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Total N qualifier Recommended	approximate	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Key findings — General population suicide numbers and rates “an average of 6,214 deaths per year” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 Figure is a multi-year average from NCISH annual report → total_n_qualifier=approximate per data-dictionary.md.	Response for Total N qualifierAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Year established Recommended	1996	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Home page body “Our study has collected in-depth information on all suicides in the UK since 1996.” Page: https://sites.manchester.ac.uk/ncish/ year_established=1996 from start year in the quoted sentence.	Response for Year establishedAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Active cohort Recommended	Yes	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Home page body “We have been collecting data for over 20 years.” Page: https://sites.manchester.ac.uk/ncish/ Ongoing national programme with contemporary reports → is_active=TRUE.	Response for Active cohortAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Ongoing recruitment Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Programme nature “We collect information on people who have died by suicide” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ Not a volunteer-recruited prospective cohort → ongoing_recruitment=FALSE.	Response for Ongoing recruitmentAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Refreshed cohort Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Programme nature “We produce a wide range of national and themed reports and journal articles” Page: https://sites.manchester.ac.uk/ncish/ Annual reporting differs from DIGIT sense of longitudinal cohort re-phenotyping waves → 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: deceased confidential enquiry — metric not applicable / not published for this 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: not a closed prospective cohort with follow-up retention statistics.	Response for Retention rateAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Published references Recommended	National Confidential Inquiry into Suicide and Safety in Mental Health (2023). Annual Report: UK patient and general population data, 2010-2020. University of Manchester.	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Report citation (title page / cite-as guidance in PDF) “The National Confidential Inquiry into Suicide and Safety in Mental Health” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 published_references array stores the cite-as reference for the downloaded 2023 annual report used for statistics.	Response for Published referencesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Notes Recommended	General-population suicide counts vary by year; 6214 is the NCISH-reported UK annual average of general-population suicides for 2010–2020 (see annual report PDF). Patient suicide and themed analyses are published separately.	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Key findings — General population suicide numbers and rates “There were 68,357 suicides in the general population in the UK between 2010 and 2020, an average of 6,214 deaths per year.” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 Cohort notes field clarifies that cohorts.total_n stores the NCISH-reported UK annual average of general-population suicides for 2010–2020, distinct from patient-suicide counts published elsewhere in the same report.	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	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What rights do we have to hold this information? “Section 251 approval; this allows us to hold identifiable and patient sensitive data;” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ Step 1 identifiable data processed YES. Step 2 access under Section 251 NHS Act framework YES (verbatim quote). Steps 3–4 (recontact / interventional research consent) do not apply to deceased patient confidential enquiry → consent_level 2 per data-dictionary.md.	Response for Consent level (axis)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Characterisation depth (axis) Required	1 — Routine EHR	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “For people who died by suicide, we collect detailed clinical information from the healthcare organisation they had contact with before death via an online questionnaire.” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ data-dictionary.md L2 requires systematically applied validated MH instruments (PHQ-9, etc.) to participants; NCISH uses post-mortem clinician returns for confidential enquiry — not that instrument model. Step 1 of characterisation tree → characterisation_depth 1 (routine clinical/administrative surveillance characterisation).	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	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Cohort data type flags “The clinical information is held on a database which is not linked to the personal identifiable information.” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ DERIVED: has_questionnaire_data=FALSE (no named validated PROM battery per dictionary TRUE branch); has_linked_health_records=FALSE (NCISH is a national enquiry dataset — use linkage booleans per overlap rule); other modality flags FALSE → hasResearch=FALSE → 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). National confidential enquiry dataset on suicide and safety in mental health services.	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	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Consent framework “Section 251 approval; this allows us to hold identifiable and patient sensitive data;” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ TWiCs-eligible requires consent_level 4 per data-dictionary.md; NCISH 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	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Sample questionnaires — heading “Our questionnaires are for use by mental health practitioners.” Page: https://sites.manchester.ac.uk/ncish/resources/sample-questionnaires/ data-dictionary.md defines has_questionnaire_data around validated participant-report instruments (PHQ-9, etc.); NCISH returns are confidential-enquiry clinician forms after death, not that modality → FALSE.	Response for Questionnaire / interviewAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Cognitive testing Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “We collect information on people who have died by suicide” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No CANTAB/neuropsychology battery described on reviewed pages → has_cognitive_data=FALSE.	Response for Cognitive testingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Physical measures Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information from the healthcare organisation” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No research anthropometry/vitals panel described → has_physical_measures=FALSE.	Response for Physical measuresAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosamples Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No biobank or tissue/DNA archive described → has_biosamples=FALSE.	Response for BiosamplesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genomic data Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No genotyping/sequencing described → has_genomic_data=FALSE.	Response for Genomic dataAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Omics Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No omics assays described → has_omics_data=FALSE.	Response for OmicsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No neuroimaging acquisition described → has_imaging_data=FALSE.	Response for ImagingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Wearable / sensor Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No wearable sensor streams described → has_wearable_data=FALSE.	Response for Wearable / sensorAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Digital phenotyping Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “detailed clinical information” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No passive smartphone/digital phenotyping described → has_digital_phenotyping=FALSE.	Response for Digital phenotypingAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Linked health records Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Conceptual overlap (data-dictionary.md) + NCISH role “NCISH and its data are based at The University of Manchester” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ Per data-dictionary.md, national enquiry/administrative programmes are not coded as linked_health_records; use has_nhs_linkage and has_death_registry_linkage instead → has_linked_health_records=FALSE.	Response for Linked health recordsAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Biosample types Recommended	No value held	Not published	NULL with has_biosamples=FALSE; no biosample inventory for this resource.	Response for Biosample typesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Genotyping platform Recommended	No value held	Not published	NULL with has_genomic_data=FALSE.	Response for Genotyping platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Imaging modalities Recommended	No value held	Not published	NULL with has_imaging_data=FALSE.	Response for Imaging modalitiesAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Mental health measures Recommended	depressive illness, personality disorder, schizophrenia and related disorders, alcohol and drug misuse, self-harm history	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Patient suicide diagnoses (report narrative) “The most common diagnoses were depressive illness (37%) and personality disorder (16%).” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 mental_health_measures array lists headline diagnosis categories evidenced in the same PDF text blocks (depression, personality disorder, schizophrenia spectrum, substance misuse, self-harm).	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	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “We share this information securely with healthcare providers who let us know whether the person was in contact with mental health services in the year before death/offence.” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ Routine matching to NHS mental health provider contacts → has_nhs_linkage=TRUE.	Response for NHS linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
GP linkage Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “from the Office for National Statistics (ONS) (England and Wales), the National Register Office (NRS) (Scotland), and pseudonymised data” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ Reviewed full toggle lists civil-registration and police sources plus mental health provider matching; no GP/primary-care record linkage described → has_gp_linkage=FALSE.	Response for GP linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Death registry linkage Recommended	Yes	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “We receive identifying information about people who have been allocated a suicide or undetermined conclusion at coroner's inquest from the Office for National Statistics (ONS) (England and Wales)” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ ONS and devolved civil registration flows described for suicide determinations → has_death_registry_linkage=TRUE.	Response for Death registry linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Education linkage Recommended	No	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — What information do we collect? “mental health services in the year before death” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ No education sector linkage described on reviewed pages → has_education_linkage=FALSE.	Response for Education linkageAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data access mechanism Recommended	direct_application	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Data security — Access to the information by people who are not data subjects “Applications for access to the data collected by NCISH as part of the Mental Health Clinical Outcome Review Programme (MHCORP) are considered by HQIP's Data Access Request Group (DARG).” Page: https://sites.manchester.ac.uk/ncish/resources/data-security/ External researchers apply via HQIP DARG gateway → data_access_mechanism=direct_application.	Response for Data access mechanismAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
TRE platform Recommended	No value held	Not published	Searched — not published UNSOURCEABLE as NULL: access is via HQIP DARG applications rather than a named single TRE product on reviewed NCISH pages.	Response for TRE platformAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Data dictionary URL Recommended	https://sites.manchester.ac.uk/ncish/resources/sample-questionnaires/	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Resources menu “Sample questionnaires” Page: https://sites.manchester.ac.uk/ncish/resources/sample-questionnaires/ Closest public analogue to a field dictionary for NCISH confidential enquiry instruments.	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: DARG turnaround not stated on reviewed NCISH data-security page sections used.	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: no fee schedule on reviewed NCISH/HQIP pages used.	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 into cohort row from reviewed pages/PDF tables used.	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 committed to cohort row from reviewed sources.	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 committed to cohort row from reviewed sources.	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 copied into cohort scalar fields from reviewed PDF excerpts.	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 committed as cohort scalar from reviewed excerpts.	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 committed as cohort scalar from reviewed excerpts.	Response for Percent non-whiteAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Geographic coverage Recommended	national	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Home page body “all suicides in the UK since 1996” Page: https://sites.manchester.ac.uk/ncish/ UK-wide programme with devolved administration involvement described on data security 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 mapped to cohort field from reviewed sources.	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 annual collections — no single last_data_collection_date taken from 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 volunteer recruitment; programme inception captured as year_established only.	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: ongoing programme without recruitment_end_date semantics.	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	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Patient suicide diagnoses (younger people comparison) “schizophrenia and other delusional disorders (17% v. 4%)” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 Maps to diagnosis_areas.id=1 Schizophrenia — NCISH reports schizophrenia spectrum diagnoses among patient suicides.	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	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Rendered page content (WordPress REST) “There were 1,491 patients who died by suicide who had received a primary diagnosis of bipolar disorder, 8% of all patient suicides, an average of 136 deaths per year.” Page: https://sites.manchester.ac.uk/ncish/wp-json/wp/v2/pages/5743 Phase B: bipolar disorder patient suicide statistics on NCISH annual report 2025 theme page; HTML snapshot is builder-heavy so JSON content.rendered is the citable text carrier.	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	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Patient suicide diagnoses “The most common diagnoses were depressive illness (37%) and personality disorder (16%).” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831	Response for Diagnosis area: Major depressive disorderAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Substance use disorders Recommended Confirm this diagnosis area applies and estimated N if shown.	Substance use disorders · Substance Use	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Patient characteristics narrative “those with alcohol (48%) and drug (37%) misuse” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 Substance use disorders diagnosis area (id=18) supported by alcohol/drug misuse context in patient suicide analyses.	Response for Diagnosis area: Substance use disordersAccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Personality disorders (BPD) Recommended Confirm this diagnosis area applies and estimated N if shown.	Personality disorders (BPD) · Personality Disorders	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Patient suicide diagnoses “The most common diagnoses were depressive illness (37%) and personality disorder (16%).” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 Personality disorders (BPD) row maps headline personality disorder share.	Response for Diagnosis area: Personality disorders (BPD)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Self-harm (non-suicidal) Recommended Confirm this diagnosis area applies and estimated N if shown.	Self-harm (non-suicidal) · Self-Harm and Suicidality	Field-cited	NCISH Annual Report 2023 — UK patient and general population data 2010–2020 (University of Manchester) https://documents.manchester.ac.uk/display.aspx?DocID=66831 Section: Patient characteristics narrative “self-harm (64%) and there were high proportions of” Page: https://documents.manchester.ac.uk/display.aspx?DocID=66831 Phase B NEW row: prior self-harm is a repeatedly quantified clinical antecedent in NCISH patient suicide analyses → diagnosis_areas.id=26 (Self-harm).	Response for Diagnosis area: Self-harm (non-suicidal)AccurateNeeds correctionNot sureDoes not apply No response selected	No notes
Diagnosis area: Suicidality Recommended Confirm this diagnosis area applies and estimated N if shown.	Suicidality · Self-Harm and Suicidality	Field-cited	NCISH — National Confidential Inquiry into Suicide and Safety in Mental Health (University of Manchester) https://sites.manchester.ac.uk/ncish/ Section: Home page body “Our study has collected in-depth information on all suicides in the UK since 1996.” Page: https://sites.manchester.ac.uk/ncish/ Phase B NEW row: suicidality diagnosis area captures NCISH core outcome (suicide deaths) studied nationally.	Response for Diagnosis area: SuicidalityAccurateNeeds 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 NCISH University of Manchester website (home, data security, sample questionnaires), NCISH Annual Report 2023 PDF (University of Manchester DocID 66831), WordPress JSON export for the bipolar disorder theme page (page id 5743), docs/data-population-plan.md (Group 4 list), ClinicalTrials.gov API v2 (query.term=NCISH; 0 studies), ISRCTN XML API (National Confidential Inquiry suicide; 0 trials), HDR UK Innovation Gateway API probe (datasets search route returned HTTP error), and DPUK homepage fetch (no NCISH string match).	Internal	Internal catalogue field	—	—