Fracture risk revisited: Bone mineral density T‐score and fracture risk in type 2 diabetes

Abstract

AbstractAimTo study the association between femoral neck (FN) bone mineral density (BMD) T‐score and fracture risk in individuals with and without type 2 diabetes (T2D).Materials and MethodsWe performed a single‐centre retrospective cohort study using the Danish National Health Service. BMD of the FN was measured by dual‐energy X‐ray absorptiometry. Cox proportional hazards regression models were used to study the association between FN BMD T‐score and fractures in individuals with and without T2D separately, adjusted for age, comorbidities and comedication. The results from this analysis were used to estimate the 10‐year absolute fracture risk.ResultsIn total, there were 35,129 women (2362 with T2D) and 7069 men (758 with T2D).The FN BMD T‐score was significantly associated with risk of any, hip and major osteoporotic fracture in men and women with [adjusted hazard risk ratios (aHR) women, hip: 1.57; 95% confidence interval (CI) 1.24–2.00, incidence rate (IR) 8.7; aHR men, hip: 1.55; 95% CI 1.01–2.36, IR 4.6] and without T2D (aHR women, hip: 1.75; 95% CI 1.64–1.87, IR 7.0; aHR men, hip: 1.97, 95% CI 1.73–2.25, IR 6.3), and its ability to predict fracture risk was similar. Fracture IRs were not significantly different for individuals with or without T2D, nor was the estimated cumulative 10‐year fracture risk.ConclusionsThe FN BMD T‐score was significantly associated with hip, non‐spine and major osteoporotic fracture risk in men and women with and without T2D. Fracture risk for a given T‐score and age was equal in individuals with and without T2D, as was the ability of the FN BMD T‐score to predict fracture risk.