Unlabelled: Denosumab significantly increased lumbar spine and total hip bone mineral density in patients with hip fractures, with comparable efficacy to that in other than hip fracture patients. Its effect was more pronounced in medication-naïve patients, suggesting its efficacy regardless of hip fracture status.
Purpose: Denosumab, a potent antiresorptive agent, has been recognised to increase bone mineral density (BMD) and reduce fracture risk in vertebrae and hips. Despite its widespread use, no sequential follow-up studies have investigated its effects on BMD in patients with hip fractures. This study aimed to analyse the effect of denosumab on BMD gain in patients with hip fractures and investigate the incidence of subsequent hip fractures.
Methods: This retrospective study analysed 371 patients treated with denosumab for at least 3 years, including 122 patients with hip fractures. 1:1 propensity score matching was used to compare BMD changes in the lumbar spine, total hip, and femoral neck, as well as additional hip fracture incidence between the hip fracture and the other than hip fracture group. Ultimately, 122 patients in each group were compared. Subgroup analysis compared osteoporosis medication-naïve patients with those with prior medication use.
Results: The hip fracture and other than hip fracture group exhibited significant annual increases in lumbar spine and total hip BMD, with no significant differences between them after matching. The femoral neck BMD increased significantly only in the first year. The incidence of additional hip fractures did not differ significantly between the groups. Moreover, the effect of denosumab on BMD increase was more pronounced in patients without a previous medication history for anti-osteoporosis treatment than in those with such a history.
Conclusion: Denosumab significantly increased lumbar spine and total hip BMD in patients with hip fractures, with comparable efficacy to that in other than hip fracture patients. Its effect was more pronounced in medication-naïve patients, suggesting its efficacy regardless of hip fracture status.
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