Background: The link between post-traumatic stress disorder (PTSD) and chronic pain conditions, specifically pelvic pain, has long been established. Within a chronic pelvic pain (CPP) population, the prevalence of PTSD is 31%, compared with 10% of women in the general population. In this group, the diagnosis of PTSD is usually associated with exposure to sexual and physical abuse. CPP is known to be a difficult diagnosis, in that many patients are refractory to treatment or suffer relapses. Meanwhile, PTSD alone is associated with overall poorer health outcomes. However, there is limited information on how pre-existing PTSD affects CPP in regards to treatment outcomes and disease trajectory. Objective: To determine if a diagnosis of PTSD is associated with differences in long-term pain outcomes among a CPP population treated with surgery.