Diagnostic associations with hypermobility in rheumatology patients.

Although we have considerable knowledge of the demographic characteristics of hypermobile individuals in population studies, we have little understanding of the implications of hypermobility. In this rheumatology clinic-based study we assessed the prevalence, diagnostic associations and clinical features of hypermobility in consecutive newly referred patients. Hypermobility was identified in 50 of 378 patients (13.2%). The most common clinical diagnosis in the hypermobile patients, compared with controls (those without hypermobility), was soft tissue rheumatism observed in 67% vs 25% (P<0.001). Fibromyalgia syndrome was the common specific rheumatological diagnosis in 30% vs 8% (P<0.001) and inflammatory arthritis the least common diagnosis in 4% vs 32% (P<0.001) of hypermobile versus non-hypermobile patients, respectively. Hypermobile patients complained of previous pain, including widespread or multiple localized sites of pain and spinal pain. Although clinic-based studies may not accurately reflect disease patterns as seen in the population, these results suggest an association between hypermobility and soft tissue rheumatic complaints and should be useful to the clinical rheumatologist.