The effect of enemy combat tactics on PTSD prevalence rates: A comparison of Operation Iraqi Freedom deployment phases in a sample of male and female veterans.

Objective: Research suggests that the nature of combat may affect later development of posttraumatic stress disorder (PTSD) in combat veterans. Studies comparing rates of PTSD across different conflicts indicate that the use of asymmetric or guerilla-style tactics by enemy fighters may result in higher rates of PTSD among U.S.