Abstract
Quantitative ultrasound measurement (QUS) and bone mineral density (BMD) have each been shown to predict fracture risk in women. The present study examined whether a combination of QUS and BMD could improve the predictive accuracy of fracture risk. This is a population-based prospective study which involved 454 women and 445 men aged 62–89 years. Femoral neck BMD (FNBMD) was measured by DXA and calcaneal QUS was measured as broadband ultrasound attenuation (BUA) by a CUBA sonometer. Fragility fracture was ascertained by X-ray reports during the follow-up period, which took place between mid-1989 and 2009. During the follow-up period (median 13 years, range 11–15), 75 men and 154 women sustained a fragility fracture. In women, the model with FNBMD and BUA had a higher AUC compared to that without BUA (0.73 vs. 0.71 for any fracture, 0.81 vs. 0.77 for hip fracture, and 0.72 vs. 0.70 for vertebral fracture). Reclassification analysis yielded a total net reclassification improvement of 7.3%, 11.1%, and 5.2% for any, hip, and vertebral fractures, respectively. For men, the addition of BUA to FNBMD did not improve the predictive power for any, hip, or vertebral fracture. These results suggest that calcaneal QUS is an independent predictor of fracture risk and that a combination of QUS and BMD measurement could improve the predictive accuracy of fracture risk in elderly women.
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Acknowledgement
We gratefully acknowledge the assistance of Sr. Janet Watters, Donna Reeves, Shaye Field, and Jodie Ratleg for the interview, data collection, and measurement of BMD. We thank Mr. J. McBride and the IT group of the Garvan Institute of Medical Research for the management of the database. The study was partly supported by the Australian National Health and Medical Research Council (NHMRC). N. D. N. is supported by a fellowship from the AMBeR (Australian Medical Bioinformatics Resource). T. V. N. is supported by a senior research fellowship from the Australian NHMRC.
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J.A. Eisman has served as consultant/advisory role to Amgen, deCode, Eli Lilly, Merck Sharp & Dohme, Novartis, Sanofi-Aventis, and Servier. J. R. Center has served as consultant/advisory role to Amgen, Merck Sharp & Dohme, Novartis, and Sanofi-Aventis. T.V. Nguyen has served as consultant/advisory role to Merck Sharp & Dohme, Novartis, Roche, and Servier. All other authors have stated that they have no conflict of interest.
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Chan, M.Y., Nguyen, N.D., Center, J.R. et al. Absolute Fracture-Risk Prediction by a Combination of Calcaneal Quantitative Ultrasound and Bone Mineral Density. Calcif Tissue Int 90, 128–136 (2012). https://doi.org/10.1007/s00223-011-9556-3
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DOI: https://doi.org/10.1007/s00223-011-9556-3