In-Theater Mental Health Disorders Among U.S. Soldiers Deployed Between 2008 and 2013.

Deployed service members regularly undergo demanding and stressful experiences that can contribute to mental health difficulties; however, there is a scarcity of studies examining rates of mental health disorders in-theater. The current study examined case rates of mental health disorders among deployed U.S. Army Soldiers using diagnostic encounter data from the Theater Medical Data Store. Case rates were calculated across 12 categories of mental health disorders. While in theater, soldiers' highest rates were for stress reactions and adjustment disorders, depression, anxiety, and sleep disorders. The lowest rates in theater were for psychosis, bipolar, somatic, and eating disorders. Notably, female soldiers had higher rates than their male counterparts for disorders in each of the 12 diagnostic categories. Results provide crucial information to aid in decision making about necessary interventions and provider competencies in deployed settings. Knowledge gained from these data may improve force readiness, help lessen disease burden, and inform military policy and prevention efforts.