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Purpose. The purpose of this study was to examine the effects of selfefficacy on selfreport pain and physical activities among subjects with fibromyalgia (FM). In addition, descriptive statistics of the Arthritis Impact Measurement Scale (AIMS), a measure developed for use with arthritis patients, were reported.

Methods. Seventynine subjects with FM, as classified by the American College of Rheumatology (ACR) criteria, completed the Visual Analogue Scale for Pain, the AIMS, and the Arthritis SelfEfficacy Scale. A myalgic score was obtained during a tender point evaluation. Hierarchical multiple regression analyses were used to assess the effect of selfefficacy on selfreport pain and physical activities measures after controlling for demographic variables (age, education, and symptom duration), disease severity (myalgic scores), and psychological distress (negative affect from the AIMS).

Results. Higher self …