title: Joint hypermobility in patients with fibromyalgia syndrome.
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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Sant Jordi Centro Médico Reus, Tarragona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Acasuso-Díaz
authors.forename: E
authors.initials: E
authors.lastname: Collantes-Estévez
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005356:Fibromyalgia / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D007593:Joint Instability / Q000150:complications* / Q000503:physiopathology; D008875:Middle Aged; D010146:Pain / Q000209:etiology