Suicidal behaviour and associated risk factors among opioid-dependent individuals: a case–control study
Article first published online: 3 SEP 2007
Volume 102, Issue 12, pages 1933–1941, December 2007
How to Cite
Maloney, E., Degenhardt, L., Darke, S., Mattick, R. P. and Nelson, E. (2007), Suicidal behaviour and associated risk factors among opioid-dependent individuals: a case–control study. Addiction, 102: 1933–1941. doi: 10.1111/j.1360-0443.2007.01971.x
- Issue published online: 3 SEP 2007
- Article first published online: 3 SEP 2007
- Submitted 16 January 2007; initial review completed 28 March 2007; final version accepted 19 June 2007
- Attempted suicide;
- borderline personality disorder;
- case–control study;
- opioid dependence;
- post-traumatic stress disorder;
- risk factors
Aims To examine suicidal behaviour and the associated risk factors among opioid-dependent cases and non-opioid-dependent controls.
Design Case–control study.
Setting Sydney, Australia.
Participants A total of 726 opioid-dependent cases and 399 non-opioid-dependent controls, matched on age, sex and employment status.
Findings Cases had significantly higher life-time prevalence of suicidal thoughts (66% versus 55%), suicide attempts (31% versus 20%) and multiple attempts (19% versus 11%) compared to controls. Cases were significantly more likely to indicate a severe intent to die (63% versus 43%). Both cases and controls who had attempted suicide were significantly more likely than others to suffer from substance use and psychological disorders, as well as childhood maltreatment. Risk factors which predicted suicide attempts were the same among cases and controls, including screening positive for borderline personality disorder, post-traumatic stress disorder and persistent suicidal thoughts.
Conclusions Although controls had elevated levels of suicidal behaviour compared to those seen in general population surveys, the prevalence of suicidal behaviour among cases was still much higher. Although opioid dependence was related to suicidal behaviour, it did not make a unique contribution to the risk of suicide attempts over and above the other risk factors identified.