Evaluating Supplementing Residential Substance Use Treatment With Written Exposure Therapy for Veterans With Post Traumatic Stress Disorder (PTSD) and Substance Use Disorders (SUD)

Residential Written Exposure Therapy (resWET): TAU plus 5-individual WET sessions (40-60 min each; Marx \& Sloan, 2019) twice a week for two weeks and once a week for the final session, administered by WET trained psychologists, social workers, or postdoctoral residents. Treatment instructions are read, patients write for 30 minutes, and the writing is briefly processed. No formal written homework is required.

Treatment as Usual (DOM SUD): The DOM SUD (TAU) is a 24-bed intensive SUD residential program with a typical 28-day length of stay. The program focuses on evidence-based treatments for SUD such as Cognitive-Behavioral Therapy, Motivational Enhancement Therapy, Medication Assisted Treatment, and Contingency Management therapy. Patients diagnosed with PTSD are typically referred to outpatient PTSD treatment following DOM SUD and often attend Seeking Safety during the program. Most of the programming is group-based though Veterans also have weekly individual case management appointments.