Joint hypermobility in patients with fibromyalgia syndrome

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Abstract
Objective. To test the hypothesis that joint hyperlaxity can play some role in the pathogenesis of pain in primary fibromyalgia. Methods. A total of 66 women with fibromyalgia (according to the 1990 American College of Rheumatology criteria) and 70 women with other rheumatic diseases were examined for joint laxity based on 5 criteria (The Non-Dominant Spanish modification). Individuals meeting 4 or 5 criteria were considered to be hyperlax. Results. Joint hyperlaxity was detected in 18 (27.3%) of the patients with fibromyalgia and 8 (11.4%) of those with another rheumatic disorder. The statistical analysis revealed significant differences (p < 0.05) between both groups. Conclusion. The results of this study suggest that joint hypermobility and fibromyalgia are associated. Joint hyperlaxity may play a prominent role in the pathogenesis of pain in fibromyalgia.