Craner JR, et al. - Researchers sought to appraise outcomes for a 10-week interdisciplinary, acceptance and commitment therapy (ACT)-based, outpatient treatment model. In addition, they examined how psychological process variables (ie, pain catastrophizing, pain acceptance, pain self-efficacy) influence the treatment outcomes. They assessed 137 adults with chronic pain who completed the interdisciplinary pain rehabilitation program regarding measures of pain, pain interference, health-related quality of life, anxiety, depressed mood, insomnia, pain catastrophizing, pain acceptance, and pain self-efficacy were completed. At program discharge, they identified significant changes in all measures and a reduction in opioid doses when compared with admission. For interdisciplinary chronic pain rehabilitation, the 10-week, ACT-based treatment model is supported by this work. In addition, findings suggest pain catastrophizing, pain acceptance, and pain self-efficacy each as mechanisms by which individuals achieve successful treatment outcomes.