Impact of Collaborative Care for Underserved Patients with PTSD in Primary Care: a Randomized Controlled Trial

ABSTRACT BACKGROUND The effectiveness of collaborative care of mental health problems is clear for depression and growing but mixed for anxiety disorders, including posttraumatic stress disorder (PTSD). We know little about whether collaborative care can be effective in settings that serve low-income patients such as Federally Qualified Health Centers (FQHCs). OBJECTIVE We compared the effectiveness of minimally enhanced usual care (MEU) versus collaborative care for PTSD with a care manager (PCM). DESIGN This was a multi-site patient randomized controlled trial of PTSD care improvement over 1 year. PARTICIPANTS We recruited and enrolled 404 patients in six FQHCs from June 2010 to October 2012. Patients were eligible if they had a primary care appointment, no obvious physical or cognitive obstacles to participation, were age 18–65 years, planned to continue care at the study location for 1 year, and met criteria for a past month diagnosis of PTSD. MAIN MEASURES The main outcomes were PTSD diagnosis and symptom severity (range, 0–136) based on the Clinician-Administered PTSD Scale (CAPS). Secondary outcomes were medication and counseling for mental health problems, and health-related quality of life assessed at baseline, 6 months, and 12 months. KEY RESULTS Patients in both conditions improved similarly over the 1-year evaluation period. At 12 months, PTSD diagnoses had an absolute decrease of 56.7 % for PCM patients and 60.6 % for MEU patients. PTSD symptoms decreased by 26.8 and 24.2 points, respectively. MEU and PCM patients also did not differ in process of care outcomes or health-related quality of life. Patients who actually engaged in care management had mental health care visits that were 14 % higher ( p