Fibromyalgia with psoriatic arthritis is associated with significant sleep disturbances, according to study results published in the International Journal of Rheumatic Diseases.

Researchers enrolled patients in the study who received care at rheumatology outpatient clinics of a major research hospital in Turkey. Adult patients with a clinical diagnosis of PsA were eligible for inclusion in the study. Demographic features were collected. Clinical variables of interest included disease duration, disease activity, and exposure to disease-modifying antirheumatic drugs. Disease Activity Score-28 and Maastricht Ankylosing Spondylitis Enthesitis Score were used to assess disease activity and enthesopathy, respectively.

Fibromyalgia was diagnosed based on the American College of Rheumatology (ACR) criteria and the Fibromyalgia Impact Questionnaire (FIQ) was used to determine the effect of fibromyalgia on daily functioning. In addition, PsA-related QoL, sleep, and fatigue were measured using the PsA Quality of Life (PsAQoL), Pittsburgh Sleep Quality Index, and Multidimensional Assessment of Fatigue scales, respectively. Sleep, QoL, and fatigue parameters were compared between patients with and without co-occurring fibromyalgia. Hierarchic multiple regression was used to examine the contributions of various demographic and clinical factors to FIQ scores.

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