Sex differences in risk factors for suicidality among Japanese substance use disorder patients: Association with age, types of abused substances, and depression
Article first published online: 26 JUL 2012
© 2012 The Authors. Psychiatry and Clinical Neurosciences © 2012 Japanese Society of Psychiatry and Neurology
Psychiatry and Clinical Neurosciences
Volume 66, Issue 5, pages 390–396, August 2012
How to Cite
Matsumoto, T., Matsushita, S., Okudaira, K., Naruse, N., Cho, T., Muto, T., Ashizawa, T., Konuma, K., Morita, N. and Ino, A. (2012), Sex differences in risk factors for suicidality among Japanese substance use disorder patients: Association with age, types of abused substances, and depression. Psychiatry and Clinical Neurosciences, 66: 390–396. doi: 10.1111/j.1440-1819.2012.02374.x
- Issue published online: 26 JUL 2012
- Article first published online: 26 JUL 2012
- Received 16 February 2011; revised 25 March 2012; accepted 27 March 2012.
- risk factor;
- substance use disorder;
Aim: The aim of this study was to identify risk factors for suicide in Japanese substance use disorder (SUD) patients, adjusting for age and sex, and to examine sex differences in suicide risk among these patients.
Methods: A self-reporting questionnaire on age, sex, types of abused substances, current depression, and suicidality was administered to 1420 SUD patients who consecutively visited seven hospitals specializing in SUD treatment during the month of December 2009. Unadjusted/adjusted odds ratios of factors associated with suicidality were calculated for each sex.
Results: The multivariate analysis using the total sample identified younger age, female sex, and current depression as risk factors for severe suicidality in SUD patients. The multivariate analysis by each sex demonstrated that younger age and current depression were associated with severe suicidality in male SUD patients. Only current depression was associated with severe suicidality in female patients.
Conclusion: Current depression is a risk factor for suicide in SUD patients common in both Western countries and Japan, although in Japanese SUD patients both younger age and female sex were more closely associated with severe suicidality than aspects of SUD. Additionally, young male SUD patients are speculated to have psychosocial features associated with suicidality in common with female SUD patients.