Posttraumatic stress disorder (PTSD) is highly co-morbid with internalizing conditions, including major depression and anxiety disorders. Prevalence estimates suggest over half of PTSD patients meet criteria for one such disorder(1–8).

What is an internalizing disorder?

Internalizing disorders are rooted in distress emotions (e.g., sadness and fear) and include depressive tendencies, loneliness, anxiety symptoms, and somatic complaints (e.g., complaints about headaches and stomachaches). From: Encyclopedia of Adolescence, 2011.

What disorder does PTSD fall under?

Post-traumatic stress disorder (PTSD) is an anxiety disorder caused by very stressful, frightening or distressing events.