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  • Title: Self-reported fractures and associated factors in women with systemic lupus erythematosus.
    Author: Lee C, Almagor O, Dunlop DD, Manzi S, Spies S, Ramsey-Goldman R.
    Journal: J Rheumatol; 2007 Oct; 34(10):2018-23. PubMed ID: 17787041.
    Abstract:
    OBJECTIVE: To determine the frequency of fractures and associated factors in women with systemic lupus erythematosus (SLE). METHODS: Women with SLE (n = 304) completed this cross-sectional study conducted from 1996 to 2002. Self-reported fractures occurring after the diagnosis of SLE were evaluated. Hip and/or lumbar spine bone mineral density (BMD) was measured using dual-energy x-ray absorptiometry, and the results were expressed as BMD Z-scores. Multiple logistic regression analyses were performed to identify factors associated with fractures. RESULTS: Of the 304 women with SLE, 12.5% experienced fractures. Those with fractures had significantly lower BMD Z-scores at the hip (Fracture group -0.55 vs No Fracture group -0.14, group difference 0.41; 95% CI 0.04 to 0.78), but not at the lumbar spine (Fracture group -0.25 vs No Fracture group -0.18, group difference 0.07; 95% CI -0.43 to 0.57). Among women with fractures, 60.5% and 63.2% had normal BMD Z-scores (BMD Z-score > -1.0) at the hip and lumbar spine, respectively, and 50.0% had normal BMD Z-scores at both anatomical sites. In multiple logistic regression analysis, each year of disease duration (adjusted OR 1.11; 95% CI 1.05 to 1.17) and use of osteoporosis medications (adjusted OR 4.75; 95% CI 1.62 to 13.94) were significantly associated with fractures. CONCLUSION: . Longer duration of SLE and use of osteoporosis medications were significantly associated with fractures. Although women with fractures had significantly lower BMD Z-scores at the hip, an unexpectedly high proportion of women with SLE having normal BMD Z-score experienced fractures following SLE diagnosis.
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