Impact of Treatment Setting and Format on Symptom Severity Following Cognitive Processing Therapy for Posttraumatic Stress Disorder

Preliminary data suggest cognitive processing therapy (CPT) significantly reduces posttraumatic stress disorder (PTSD) symptom severity among military personnel and veterans when delivered over 12 days and combined with daily recreational activities (Bryan et al., 2018). The present study aimed to examine how therapy pace (i.e., daily vs. weekly sessions) and setting (i.e., clinic vs. recreational) impacts change in PTSD symptom severity. Forty-five military personnel and veterans diagnosed with PTSD chose to receive CPT (a) daily at a recreational facility with recreational programming, (b) daily on a university campus without recreational programming, and (c) weekly on a university campus without recreational programming. PTSD symptom severity was assessed with the Clinician Administered PTSD Scale for DSM-5 (CAPS-5) and the Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5). Reductions in CAPS-5 and PCL-5 scores were large and statistically significant across all three settings (Cohen's ds2.1). As compared to reductions in CAPS-5 and PCL-5 scores in daily therapy at a recreational facility (CAPS-5: d = 1.63-2.40; PCL-5: d = 1.99-2.17), reductions in CAPS-5 and PCL-5 scores were significantly larger in daily therapy on campus, CAPS-5: t(80) = -2.9, p = .005, d = 2.23-2.69; PCL-5: t(78) = 2.6, p = .010, d = 2.54-4.43, but not weekly therapy on campus, CAPS-5: t(80) = 0.2, p = .883, d = 1.04-2.47; PCL-5: t(78) = 1.0, p = .310, d = 1.77-3.44. Participants receiving daily therapy on campus and weekly therapy on campus also had higher rates of clinically significant improvement and good end-state functioning. Results support the effectiveness of CPT across multiple treatment settings and formats and suggest that daily CPT may be less effective when delivered in combination with recreational activities.