Abstract
There is limited evidence regarding which fracture types carry the highest risk for subsequent fracture. The aim of this study was to investigate how the risk of imminent fracture depends on index fracture site. This nationwide retrospective cohort study utilized national registers in Sweden to determine the risk of fracture according to recent (≤2 years) index fracture site and according to an old (>2 years) prevalent fracture compared with the risk observed in controls without a fracture. All Swedes 50 years or older between 2007 and 2010 were included in the study. Patients with a recent fracture were designated a specific fracture group depending on the type of previous fracture. Recent fractures were classified as major osteoporotic fracture (MOF), including fractured hip, vertebra, proximal humerus, and wrist, or non-MOF. Patients were followed until December 31, 2017, censored for death and emigration, and the risk of any fracture and hip fracture was assessed. A total of 3,423,320 persons were included in the study, 70,254 with a recent MOF, 75,526 with a recent non-MOF, 293,051 with an old fracture, and 2,984,489 persons with no previous fracture. The median time of follow-up for the four groups was 6.1 (interquartile range [IQR] 3.0-8.8), 7.2 (5.6-9.4), 7.1 (5.8-9.2), and 8.1 years (7.4-9.7), respectively. Patients with a recent MOF, recent non-MOF, and old fracture had a substantially increased risk of any fracture (hazard ratio [HR] adjusted for age and sex 2.11, 95% confidence interval [CI] 2.08-2.14; HR 2.24, 95% CI 2.21-2.27; and HR 1.77, 95% CI 1.76-1.78, respectively) compared with controls. All recent fractures, MOFs, and non-MOFs, as well as older fractures, increase the risk of subsequent fracture, suggesting that all recent fractures should be included in fracture liaison services and that case-finding strategies for those with older fractures may be warranted to prevent subsequent fractures. © 2023 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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