This study examined differences in depression symptoms between four Personality Disorder (PD) groups in 123 adult survivors of abuse who completed a 6-week inpatient program for Post-traumatic Stress Disorder (PTSD). Data were collected at admission, discharge, 3-months, and 1-year post-treatment. Participants completed self-report measures at each time point. Based on Millon Clinical Multiaxial Inventory-II scores, participants were divided into four PD groups: avoidant, borderline, dependent, and histrionic. MANOVAs and ANOVAs were calculated to examine depression symptoms over time. Depression and hopelessness symptoms decreased post-treatment, and treatment gains were maintained at 1-year. Multiple regressions were calculated to determine which PD trait was the best predictor of response to treatment Erin R. Kraftcheck, MA, MD, is currently training within the department of Family and Community Medicine at the University of Toronto.