Control-related beliefs and sleep characteristics of posttraumatic stress disorder patients

To examine correlations among chronic Posttraumatic Stress Disorder (PTSD), control-related beliefs, and sleep difficulties 7 PTSD casualities and 7 non-PTSD matched subjects were compared in their laboratory sleep patterns as well as in their beliefs about personal control over external and internal events in general and over sleep-related events in particular. Analyses indicated that PTSD casualties had poorer sleep and reported more doubts regarding their ability to control external and internal events than control subjects. Further, we found a significant association between perceived control and sleep difficulties. Results were discussed in terms of Horowitz's conception of intrapsychic processes related to PTSD.