Profiles of Pain Acceptance and Values-Based Action in the Assessment and Treatment of Chronic Pain.

Pain acceptance and values-based action are relevant to treatment outcomes in those with chronic pain. It is unclear if patterns of responding in these 2 behavioral processes can be used to classify patients into distinct classes at treatment onset and used to predict treatment response. This observational cohort study had 2 distinct goals. First, it sought to classify patients at assessment based on pain acceptance and values-based action (N = 1746). Second, it sought to examine treatment outcomes based on class membership in a sub-set of patients completing an interdisciplinary pain rehabilitation program of Acceptance and Commitment Therapy for chronic pain (N = 343). Latent profile analysis was used in the larger sample to identify 3 distinct patient classes: low acceptance and values-based (AV) action (Low AV; n = 424), moderate acceptance and values-based action (Moderate AV; n = 983) and high acceptance and values-based action (High AV; n = 339). In the smaller treated sample, participants in the Low AV and Moderate AV class demonstrated improvements across all outcome variables, whereas those in the High AV class did not. These findings support the role of pain acceptance and values-based action in those with chronic pain. PERSPECTIVE: Individuals with chronic pain can be classified with respect to pain acceptance and values-based action and these groups may respond differently to treatment.