Abstract
Summary
This nested case-control analysis of a Swiss ambulatory cohort of elderly women assessed the discriminatory power of urinary markers of bone resorption and heel quantitative ultrasound for non-vertebral fractures. The tests all discriminated between cases and controls, but combining the two strategies yielded no additional relevant information.
Introduction
Data are limited regarding the combination of bone resorption markers and heel quantitative bone ultrasound (QUS) in the detection of women at risk for fracture.
Methods
In a nested case-control analysis, we studied 368 women (mean age 76.2 ± 3.2 years), 195 with low-trauma non-vertebral fractures and 173 without, matched for age, BMI, medical center, and follow-up duration, from a prospective study designed to predict fractures. Urinary total pyridinolines (PYD) and deoxypyridinolines (DPD) were measured by high performance liquid chromatography. All women underwent bone evaluations using Achilles+ and Sahara heel QUS.
Results
Areas under the receiver operating-characteristic curve (AUC) for discriminative models of the fracture group, with 95% confidence intervals, were 0.62 (0.56–0.68) and 0.59 (0.53–0.65) for PYD and DPD, and 0.64 (0.58–0.69) and 0.65 (0.59–0.71) for Achilles+ and Sahara QUS, respectively. The combination of resorption markers and QUS added no significant discriminatory information to either measurement alone with an AUC of 0.66 (0.60–0.71) for Achilles+ with PYD and 0.68 (0.62–0.73) for Sahara with PYD.
Conclusions
Urinary bone resorption markers and QUS are equally discriminatory between non-vertebral fracture patients and controls. However, the combination of bone resorption markers and QUS is not better than either test used alone.
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The authors are very grateful to the SEMOF group which authorized us to use their database.
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Nanchen, D., Cornuz, J., Ruffieux, C. et al. Combining bone resorption markers and heel quantitative ultrasound to discriminate between fracture cases and controls. Osteoporos Int 20, 1695–1703 (2009). https://doi.org/10.1007/s00198-009-0843-z
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DOI: https://doi.org/10.1007/s00198-009-0843-z