Fig. 1.

Prevalence of severe fatigue [RAND(SF)-Vitality score ≤35] in patients with rheumatic diseases. Of the 6120 patients, 6034 had a SF-Vitality score; the number of patients with a missing score ranged per rheumatic disease group from 3 to 16. “A single other rheumatic disease” included all diagnoses which did not reach the minimum of 75 patients to represent a specific rheumatic population. Patients with multiple rheumatic diseases were divided into a group with fibromyalgia and a group without fibromyalgia as one of the diagnoses