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Dual-energy X-ray absorptiometry and fracture prediction in patients with spinal cord injuries and disorders.

Abderhalden L, Weaver FM, Bethel M, Demirtas H, Burns S, Svircev J, Hoenig H, Lyles K, Miskevics S, Carbone LD. Dual-energy X-ray absorptiometry and fracture prediction in patients with spinal cord injuries and disorders. Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA. 2017 Mar 1; 28(3):925-934.

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Low T-scores at the hip predict incident fractures in persons with a SCI. INTRODUCTION: Persons with a spinal cord injury (SCI) have substantial morbidity and mortality following osteoporotic fractures. The objective of this study was to determine whether dual-energy X-ray absorptiometry (DXA) measurements predict osteoporotic fractures in this population. METHODS: A retrospective historical analysis that includes patients (n? = 552) with a SCI of at least 2 years duration who had a DXA performed and were in the VA Spinal Cord Disorders Registry from fiscal year (FY) 2002-2012 was performed. RESULTS: The majority of persons (n? = 455, 82%) had a diagnosis of osteoporosis or osteopenia, with almost half having osteoporosis. BMD and T-scores at the lumbar spine were not significantly associated with osteoporotic fractures (p? > 0.48) for both. In multivariable analyses, osteopenia (OR? = 4.75 95% CI 1.23-17.64) or osteoporosis (OR? = 4.31, 95% CI 1.15-16.23) compared with normal BMD was significantly associated with fractures and higher T-scores at the hip were inversely associated with fractures (OR 0.73 (95% CI 0.57-0.92)). There was no significant association of T-scores or World Health Organization (WHO) classification with incident fractures in those with complete SCI (p? > 0.15 for both). CONCLUSION: The majority (over 80%) of individuals with a SCI have osteopenia or osteoporosis. DXA-derived measurements at the hip, but not the lumbar spine, predict fracture risk in persons with a SCI. WHO-derived bone density categories may be useful in classifying fracture risk in persons with a SCI.

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