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. 2017 Oct 6;13:1333–1341. doi: 10.2147/TCRM.S145519

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© 2017 Chin et al. This work is published and licensed by Dove Medical Press Limited

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ROC for identifying the optimal cut-off values for OSTA to identify subjects at risk of osteoporosis for each sex.

Notes: The diagonal line is the reference line and the blue line is the test line. The optimal cut-off value is determined by tracing the coordinates closest to a sensitivity value of 0.8 with a reasonable high 1 – sensitivity (specificity) value. That coordinate will translate to the optimal OSTA cut-off value.

Abbreviations: OSTA, osteoporosis self-assessment tool for Asians; QUS, quantitative ultrasound; ROC, receiver-operating curve.