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Objective. To identify the risk of hip and vertebral fractures in patients with rheumatic disorders (RD) and inflammatory bowel diseases (IBD).
Methods. This population-based case-control study assessed the fracture risk of patients with rheumatoid arthritis, juvenile idiopathic arthritis (JIA), ankylosing spondylitis (AS), systemic lupus erythematosus, polymyositis/dermatomyositis (PM/DM), systemic sclerosis (SSc), Crohn’s disease, and ulcerative colitis (UC). The study cohort comprised 53,108 patients with fracture (66% women) and 370,602 age-matched and sex-matched controls. Conditional logistic regression analysis was performed and results were expressed as OR with corresponding 95% CI.
Results. There was a statistically significant increased fracture risk for all RD and for IBD compared with controls. The magnitude of fracture risk was higher for patients with RD (OR 3, 95% CI 2.9–3.2) than for those with IBD (OR 1.6, 1.4–1.8). The OR in RD ranged from 2.6 (1.3–4.9) for SSc to 4 (3.4–4.6) for AS. The largest increased fracture risk for vertebral fractures was seen in AS (OR 7.1, 6–8.4) and for hip fractures in JIA (OR 4.1, 2.4–6.9).
Conclusion. Our results highlight the existence of an increased fracture risk from a variety of underlying causes in patients with RD and IBD. In many inflammatory diseases, implementation of fracture prevention strategies may be beneficial.
Supported by grants from the Karolinska Institutet, the Stockholm County Council, the Swedish Orthopaedic Association, and the Capio Research Foundation.
- Accepted for publication June 14, 2010.