Study Objectives: Evidence supports the use of cognitive behavioral therapies for nightmares in trauma-exposed individuals. This randomized clinical trial replicated a study of exposure, relaxation, and rescripting therapy (ERRT) and extended prior research by including broad measures of mental health diffi culties, self-reported physical health problems, and quality of life. Additionally, physiological correlates of treatment-related change assessed from a script-driven imagery paradigm were examined. Methods: Forty-seven individuals were randomized to treatment or waitlist control.
Results:The treatment group demonstrated improvements relative to the control group at the one-week post-treatment assessment. At the 6-month follow-up assessment, signifi cant improvements were found for frequency and severity of nightmares, posttraumatic stress disorder symptoms, depression, sleep quality and quantity, physical health symptoms, anger, dissociation, and tension reduction behaviors. Participants also reported improved quality of life. Treatment-related decreases in heart rate to nightmare imagery were correlated with improvements in sleep quality and quantity; treatment-related decreases in skin conductance to nightmare imagery were correlated with improvements in nightmare severity, posttraumatic stress disorder symptom severity, sleep quality, and fear of sleep; and treatment-related decreases in corrugator activity to nightmare imagery were correlated with improved physical health.
Conclusions
S C I E N T I F I C I N V E S T I G A T I O N SN ightmares following trauma exposure are consistently associated with sleep disturbance, 1 posttraumatic stress disorder (PTSD) severity, 2 physiological arousal with or without PTSD, 3 and functional impairment over and above PTSD. 4,5 Moreover, chronic nightmares (CN) may be a signifi cant maintaining factor of psychological distress, because successful treatment of CN with cognitive behavioral therapy results in the reduction of symptoms of PTSD, depression, and nightmare-related panic. 6-8 Therefore, CN may pose a pernicious health problem independent of other psychopathology. Preliminary evidence suggests that psychological treatments which broadly target PTSD may have limited impact on sleep disturbances, 9-13 and pharmacological treatments appear to have little effect 14 or only a palliative effect 15 for some individuals. Thus, cognitive behavioral approaches specifi cally addressing sleep disturbances are now being evaluated in trauma-exposed samples. The present study is a replication of a randomized controlled trial (RCT) that examined the effi cacy of exposure, relaxation, and rescripting therapy (ERRT) to treat CN in trauma-exposed persons 7 and expands previous work by assessing the infl uence of treatment on facets of health that were not included in the fi rst RCT and examining physiological predictors of treatment response.The fi rst RCT demonstrated that ERRT reduced nightmare frequency and severity, related psychopathology, and improved sleep in trauma-expo...