Abstract
Summary
The fracture predictive value of quantitative ultrasound (QUS) may be modified by previous fracture status. Non-significant associations between QUS parameters and fracture risk were observed among frail older people with a history of fracture. These findings suggest that QUS measurements for frail older people might be more useful in those without a fracture history.
Introduction
Quantitative ultrasound has been shown to predict risk of fracture in various populations. However, this ability may be modified by the presence of previous fracture in very frail older people.
Methods
We assessed bone strength by QUS and clinical risk factors at baseline for 1,982 institutionalised older people. Fractures were ascertained for 2 years from baseline and validated by X-ray reports.
Results
Study participants were very old (mean age = 85.7 ± 7.1 years) and frail (70% using walking aids). Forty-five percent reported a history of fracture. During a mean follow-up period of 1.64 years, 335 participants suffered a fracture or fractures. Fracture rates were significantly higher in participants with a history of fracture compared with those without a history of fracture (16.0 vs 9.2 per 100 person years, p < 0.001). Significant associations between fracture risk and QUS parameters (broadband ultrasound attenuation and velocity of sound) were observed among participants without a history of fracture (both p < 0.01), but not among those who had a fracture history (both p ≥ 0.7).
Conclusions
In very frail older people, QUS measurements may be more useful for assessing fracture risk in those without a history of fracture after age 50.
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Acknowledgements
The authors would like to thank Ms. J. Schwarz (Research Co-ordinator) and Ms. J. Makaroff (Research Assistant) for their efforts in co-ordinating the study and collecting the data. This study was supported by grants from the Australian National Health and Medical Research Council and Osteoporosis Australia.
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Chen, J.S., March, L.M., Cumming, R.G. et al. Role of quantitative ultrasound to predict fracture among institutionalised older people with a history of fracture. Osteoporos Int 20, 105–112 (2009). https://doi.org/10.1007/s00198-008-0638-7
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DOI: https://doi.org/10.1007/s00198-008-0638-7