Reducing hip fracture risk with risedronate in elderly women with established osteoporosis
Tahir Masud1, Michael McClung2, Piet Geusens3
1Nottingham University Hospitals NHS Trust, Nottingham, UK; 2Oregon Osteoporosis Center, Portland, Oregon, USA; 3Department of Internal Medicine, Subdivision of Rheumatology, Maastricht University Medical Center, Belgium
Background: There is limited evidence to support the efficacy of current pharmaceutical agents in reducing the risk of hip fracture in older postmenopausal women with established osteoporosis.
Objective: To clarify the efficacy of risedronate in reducing the risk of hip fracture in elderly postmenopausal women aged ≥70 years with established osteoporosis, i.e., those with bone mineral density-defined osteoporosis and a prevalent vertebral fracture.
Methods: Post hoc analysis of the Hip Intervention Program (HIP) study, a randomized controlled trial comparing risedronate with placebo for reducing the risk of hip fracture in elderly women. Women aged 70 to 100 years with established osteoporosis (baseline femoral neck T-score ≤ −2.5 and ≥ 1 prior vertebral fracture) were included. The main outcome measure was 3-year hip fracture incidence in the risedronate and placebo groups.
Results: A total of 1656 women met the inclusion criteria. After 3 years, hip fracture had occurred in 3.8% of risedronate-treated patients and 7.4% of placebo-treated patients (relative risk 0.54; 95% confidence interval 0.32–0.91; P = 0.019).
Conclusion: Risedronate significantly reduced the risk of hip fracture in women aged up to 100 years with established osteoporosis.
Keywords: osteoporosis, postmenopausal, hip fracture, risedronate
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