Predicting Disease Activity in Rheumatoid Arthritis with the Fibromyalgia Survey Questionnaire: Does the Severity of Fibromyalgia Symptoms Matter?

To determine if the degree of baseline fibromyalgia symptoms in patients with rheumatoid arthritis (RA), as indicated by the Fibromyalgia Survey Questionnaire (FSQ) score, predicts RA disease activity after initiation or change of a disease-modifying antirheumatic drug (DMARD).