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Wrist, forearm, humerus, and all upper limb fracture rate. Fracture incidence (95% CI) per 100 subject-years at the a wrist, b forearm, c humerus, and d all upper limb. 95% CIs were estimated by generalized estimating equation (GEE) method in a Poisson regression model. All p values were not adjusted for multiplicity. CI, confidence interval
