Trauma histories were obtained from 711 subjects in a large study of
anxiety disorders, with the intent of determining the prevalence and nature
of psychological trauma in this group. Twenty-seven percent of subjects
reported significant trauma; 35% of these (10% of all subjects) met
DSM-II-R criteria for posttraumatic stress disorder (PTSD). Subjects
reporting sexual trauma were significantly more likely to have PTSD. The
rate of PTSD was not higher in subjects with panic disorder than in those
with other anxiety disorders.