Comparison of characteristics of Vietnam veterans with and without posttraumatic stress disorder.

Characteristics of 107 Vietnam veterans with and without Posttraumatic Stress Disorder (PTSD), who had been exposed to varying levels of combat, were compared. Severity of psychopathology as assessed on the Eysenck Personality Questionnaire, locus of control orientation as measured by the Nowicki-Strickland Internal-External Control Scale, and ability to have provided structure and meaning to the Vietnam experience were examined. Compared to veterans with Posttraumatic Stress Disorder, those without the disorder had lower Neuroticism and Psychoticism scores, were more internal in their locus of control orientation, and were more likely to have shown ability to provide structure to the Vietnam experience. The additional finding that veterans with high combat experience but without PTSD evidenced less neuroticism than low combat veterans without PTSD provides evidence that those who did not develop the disorder despite high exposure to combat stress are individuals with exceptional emotional strength and resilience.