Mental Disorder, Psychological Distress, and Functional Status in Canadian Military Personnel

Objective: We examined the overlap between mood and anxiety disorders and psychological distress and their associations with functional status in Canadian Armed Forces (CAF) personnel. Method: Data on Regular Forces personnel (N = 6700) were derived from the 2013 Canadian Forces Mental Health Survey, a nationally representative survey of the CAF personnel. Current psychological distress was assessed using the Kessler K10 scale. Past-month mood and anxiety disorders were assessed using the World Health Organization World Mental Health Composite Diagnostic Interview. Results: The prevalence of psychological distress was the same as that of any past-month mood or anxiety disorder (7.1% for each). A total of 3.8% had both distress and past-month mood or anxiety disorder, 3.3% had past-month disorder without psychological distress, while another 3.3% had psychological distress in the absence of a past-month mood or anxiety disorder. After adjusting for age, sex, marital, education, income, language, element, rank, and alcohol use disorder, individuals with both psychological distress and past-month mood and anxiety disorders exhibited the highest levels of disability, days out of role, and work absenteeism relative to those with neither mental disorders nor psychological distress. Relative to individuals with both disorder and distress, those who endured distress in the absence of mental disorder exhibited lower, but meaningful, levels of disability compared with those with neither disorder nor distress. Conclusions: Disability is most severe among CAF personnel with both distress and past-month mood and anxiety disorders. Nevertheless, distress in the absence of disorder is prevalent and is associated with meaningful levels of disability.