This project aims to comprehensively examine the incidence of suicidality, individual and population characteristics, and health pathways, for a cohort of Australian veterans using linked administrative data.

The cohort will comprise veterans who are clients of the Department of Veterans’ Affairs (DVA) residing in Queensland between 1 January 2017 and 31 December 2022. People currently serving in the Australian Defence Force, Australian Federal Police personnel, other DVA clients who are not veterans (eg, eligible dependents), and clients currently known to DVA who have requested that their data not be disclosed for research will be excluded. This cohort will be linked to DVA administrative data, the Queensland Hospital Admitted Patients Data Collection (QHAPDC), Queensland Hospital Non-Admitted Patients Data Collection, Emergency Data Collection (EDC), Consumer Integrated Mental Health and Addiction Application (CIMHAA), Queensland Death Register, National Death Index, Medicare Benefits Schedule, Centrelink (Data Over Multiple Individual Occurrences) database and Pharmaceutical Benefits Scheme. These data will be linked for a period of at least 1-year preindex and postindex contact with DVA, such that the entire study period is expected to encompass at least 1 January 2016 to 31 December 2023.

This study received ethical approval from the Departments of Defence and Veterans’ Affairs Human Research Ethics Committee (HREC; Project ID: 556-23), and the Australian Institute of Health and Welfare HREC (Project ID: EO2024/1/1461). This project also received Public Health Act approval (File reference: PHA 556-23). The project was ratified by the University of Queensland HREC (Project ID: 2024/HE002153). The findings of this project will be disseminated via a publicly available report, presentations and peer-reviewed publications.