Abstract
Background
Postmenopausal women with a prior fracture have an increased risk for future fracture. Whether a history of non-vertebral fracture defines a group of women with low bone mass but without osteoporosis for whom alendronate would prevent new non-vertebral fracture is not known.
Subjects and Methods
Secondary analysis of data from the Fracture Intervention Trial (FIT). Of 2,785 postmenopausal women with a T-score at the femoral neck between −1 and −2.5 and without prevalent radiographic vertebral deformity, 880 (31.6%) reported experiencing a fracture after 45 years of age. Women were randomized to placebo or alendronate (5 mg/day years for the first 2 years and 10 mg/day thereafter) and were followed for an average of 4.2 ± 0.5 years. Incident non-vertebral fractures were confirmed by x-rays and radiology reports.
Results
In the placebo arm, a self-report of prior fracture identified women with a 1.5-fold (hazard ratio [RH] 1.46, 95% C.I. 1.04–2.04) increased risk for incident non-vertebral fracture. However, there was no evidence that the effect of alendronate differed across subgroups of women with (RH 1.26 for alendronate vs placebo, 95% C.I. 0.89–1.79) and without prior fracture (RH 1.02 for alendronate vs placebo, 95% C.I. 0.76–1.38; P = 0.37 for interaction).
Conclusion
Assessing a clinical risk factor, prior non-vertebral fracture, did not identify women with low bone mass for whom alendronate reduced future non-vertebral fracture risk.
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Acknowledgments
This research was sponsored by Merck Research Laboratories, Rahway, NJ.
Members of the Fracture Intervention Trial Research Group are listed in reference 23.
Authors’ contributions
Conception: KMR, SRC; Design: KMR, SRC, DCB, SS; analysis and interpretation: LP, KMR, SRC, DCB, KE; manuscript preparation: KMR, LP, SS, SRC, DCB, AF, JS, KE, AVS SRC
Sponsor role
Drafts of the manuscript were reviewed, and changes to the manuscript were recommended by all coauthors and staff at Merck. The final version of this manuscript was reviewed by all coauthors and the Fracture Intervention Trial Steering Committee; Merck Investigators constituted a minority of the steering committee. Merck Research Laboratories funded the original FIT study.
Lisa Palermo had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Conflict of Interest statement
KMR: prior research grant support from Eli Lilly; past speaker support from Proctor & Gamble. SRC: none; LP: none; SS: research grant support from Wyeth Pharmaceuticals; DCB: research funding from Merck Research Laboratories, Proctor and Gamble, Amgen, and Smith Kline Beecham; ACF: research grant support from Merck Research Laboratories, Amgen and Sanofi-Aventis; JTS: none; AVS: none; KE: none.
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This work is supported by K23 RR16047 and Merck Research Laboratories, Rahway, NJ.
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Ryder, K.M., Cummings, S.R., Palermo, L. et al. Does a History of Non-Vertebral Fracture Identify Women Without Osteoporosis for Treatment?. J GEN INTERN MED 23, 1177–1181 (2008). https://doi.org/10.1007/s11606-008-0622-0
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DOI: https://doi.org/10.1007/s11606-008-0622-0