Table 2.
Sensitivity, specificity and Youden Index for POL-RISK cut-offs, referred to Garvan calculator results, stratified according to the 8% threshold (i.e. low fracture risk threshold by the Garvan method)
| Cut-off | Sensitivity | Specificity | Youden Index |
|---|---|---|---|
| 8.3 | 0.867 | 0.7 | 0.567 |
| 8.4 | 0.861 | 0.71 | 0.566 |
| 8.5 | 0.86 | 0.714 | 0.575 |
| 8.6 | 0.855 | 0.733 | 0.587 |
| 8.7 * | 0.849 | 0.747 | 0.595 |
| 8.8 | 0.837 | 0.756 | 0.593 |
| 8.9 | 0.82 | 0.756 | 0.576 |
| 9 | 0.814 | 0.76 | 0.574 |
| 9.4 | 0.785 | 0.779 | 0.564 |
| 9.9 | 0.744 | 0.82 | 0.564 |
*The optimal (according to Youden Index) POL-RISK threshold, corresponding to the low fracture risk threshold, established for Garvan calculator