Table 3.
Data sets available within the Secure Anonymised Information Linkage (SAIL) Databank for linkage with Suicide Information Database (SID)-Cymru cases and controls
| Data set | Data description | Data provider | Data type | Geographical coverage | Available from |
|---|---|---|---|---|---|
| Annual District Death Extract | Register of all deaths relating to Welsh residents, including those who died out of Wales | NHS Wales’ Informatics Service (NWIS)/ Health Solutions Wales (HSW) on behalf of Office of National Statistics (ONS) | Registry data | Wales | 2003 |
| Welsh Demographic Service | Administrative information about individuals in Wales who use National Health Service (NHS) services; such as address and practice registration history. It replaced the NHS Wales Administrative Register (NHS AR) in 2009 | NWIS/HSW | Administrative (mandatory) data return | Wales | 1990 |
| Area-Based Deprivation Scores | Lower Super Output Area—Townsend Deprivation Index and Welsh Index of Multiple Deprivation Scores | NWIS/ HSW | Administrative data | Wales | 2001/2005 |
| Education attainment | Educational attainment at key stages (pre 16 years old). Data collated from school census, the national pupil survey and educational attainment databases by the Welsh Government | Department for Children, Education, Lifelong Learning and Skills | Administrative/ survey data | Wales | 2005 |
| General Practice (GP) data set | Each GP practice uses a clinical information system to maintain an electronic health record for each of its patients; capturing the signs, symptoms, test results, diagnoses, prescribed treatment, referrals for specialist treatment and social aspects relating to the patient’s home environment | Welsh GPs who have signed up to the SAIL Databank | Clinical system data | Wales | 2000 |
| Patient Episode Database for Wales | NHS Wales—hospital admissions (inpatients and day cases) data set comprising of attendance and clinical information for all hospital admissions: includes diagnoses and operations performed | NWIS/HSW | Administrative (mandatory) data return | Wales | 1997 |
| Outpatient Dataset | Attendance information for all NHS Wales hospital outpatient appointments | NWIS/HSW | Administrative (mandatory) data return | Wales | 2004 |
| Emergency Department Data Set | Administrative and clinical information for all NHS Wales accident and emergency department attendances. Includes the All Wales Injury Surveillance Systems (AWISS) data set | NWIS/HSW | Administrative (mandatory) data return | Wales | 2009 |