Pain Catastrophizing as a Mediator Between Pain Self-Efficacy and Disease Severity in Patients with Fibromyalgia.

Background: Fibromyalgia (FM) is characterized by chronic widespread pain, fatigue, sleep disturbances, cognitive impairment, and mood disturbance. Both pain catastrophizing and pain self-efficacy have been found to be mediators of pain treatment effectiveness. However, whether pain catastrophizing mediates the association between pain self-efficacy and FM severity remains unclear.