Integration of Cognitive Processing Therapy and Relapse Prevention for Alcohol Use Disorder and Co-Occurring PTSD: A Randomized Clinical Trial

PROJECT SUMMARY/ABSTRACT A substantial proportion of individuals with alcohol use disorder (AUD) also meet criteria for posttraumatic stress disorder (PTSD). The co-occurrence of AUD/PTSD is characterized by more severe symptomatology, greater functional impairment, increased suicide risk, and poorer treatment outcomes as compared to either disorder alone. Trauma-focused, cognitive-behavioral interventions delivered alongside interventions for substance use disorders are most effective in reducing PTSD severity and substance use. Cognitive Processing Therapy (CPT) for PTSD and Relapse Prevention (RP) for AUD are two of the most widely used and efficacious behavioral treatments for these conditions. The investigators successfully developed and pilot tested a therapy manual that combines CPT with RP. The preliminary data demonstrate safety, feasibility, high rates of retention (80.0%) and patient satisfaction. Moreover, our data from a recent national survey of frontline mental health providers (N = 76) indicate that CPT is the most commonly used trauma-focused treatment for PTSD and providers are highly interested in an integrative CPT-RP intervention, conferring strong potential for uptake in real-world practice settings. In fact, due to the lack of an available, empirically developed, manualized CPT-RP treatment, 84.0% of frontline providers report attempting on their own to create such a treatment to use with their patients. This may result in highly variable and suboptimal implementation and outcomes. In response to provider input and positive preliminary data, the proposed study directly addresses this critical need by evaluating a new integrative CPT- RP treatment for individuals with co-occurring AUD and PTSD. At present, only one trauma-focused, integrative intervention is available for AUD/PTSD and it uses Prolonged Exposure (PE) to reduce PTSD symptoms. In comparison to PE, CPT is more widely used, often preferred by clinicians, equally as effective in reducing PTSD symptoms, and associated with lower dropout rates. Thus, the new CPT-RP intervention could have wider reach and greater acceptability than exposure-based treatments. Treatment choice is related to improved treatment outcomes, and therefore, there is an immediate need to add to the portfolio of evidence-based, trauma-focused, integrative treatments for AUD/PTSD. The primary objective of this Stage II study is to examine the efficacy of CPT-RP, as compared to RP alone, in reducing (1) alcohol use frequency and quantity and (2) PTSD symptom severity among individuals with current AUD/PTSD. To accomplish this, we will employ a manualized intervention, randomized study design, and standardized repeated dependent measures of clinical outcomes at multiple time points. Putative mechanisms of behavior change will be evaluated via daily monitoring. The proposed study aligns closely with the mission of NIAAA in that it aims to produce maximally efficacious behavioral interventions for AUD and comorbid psychiatric disorders such as PTSD. The findings from this study will provide new information to advance the science of AUD/PTSD comorbidity and innovate clinical practice.