ArticleClinical rheumatology2026
Fibromyalgia in patients with idiopathic inflammatory myopathies: prevalence, associated factors, and relationship with patient outcomes and health care utilization.
Article in Clinical rheumatology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
objectivesFibromyalgia is a chronic pain syndrome that can be seen as a comorbid condition in several autoimmune diseases; however, its characteristics have not been studied in patients with idiopathic inflammatory myopathies (IIM). Through this study, we aimed to assess the prevalence of fibromyalgia, factors associated with fibromyalgia, and the relationship between fibromyalgia and health outcomes and care utilization in patients with IIM.
methodsData were provided by patients in FORWARD, a US-wide longitudinal registry of adults with rheumatological diseases. Patients with a diagnosis of IIM who were enrolled from physician offices and completed biannual questionnaires on their health status were included. A fibromyalgia diagnosis was defined as meeting the 2016 modified fibromyalgia criteria. We examined the prevalence of criteria-defined fibromyalgia in IIM subgroups and compared participant characteristics and health outcomes based on the presence of fibromyalgia. Logistic regression models were conducted to identify factors associated with fibromyalgia.
resultsFifty-seven (34%) of 167 patients with IIM met the fibromyalgia criteria. Patients with fibromyalgia were younger, had a lower education level and total annual income, and were more likely to be prescribed opioids for pain management. Younger age, lower education level, and comorbid anxiety were independently associated with fibromyalgia. Patients with fibromyalgia had significantly lower health satisfaction, worse patient-reported outcomes, including quality of life and physical function, and higher health care utilization.
conclusionApproximately one-third of patients with IIM had criteria-defined fibromyalgia. Fibromyalgia was associated with worse patient-reported outcomes, less advantaged sociodemographic factors, and higher health care utilization in patients with IIM. Keypoints • Approximately one-third of patients with IIM had criteria-defined fibromyalgia. • Younger age, lower education level, and comorbid anxiety were independently associated with a fibromyalgia diagnosis. • Fibromyalgia was associated with less advantaged sociodemographic factors, worse patient-reported outcomes, and higher health care utilization in patients with IIM.
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