Clinical examination versus US as the “gold standard”. Data showing sensitivity, specificity, false positive (FPR) and false negative rate (FNR), positive (PPV) and negative predictive value (NPR). Results are shown as percentages
| Sensitivity | Specificity | FPR | FNR | PPV | NPR | |
|---|---|---|---|---|---|---|
| Total | 22.6 | 79.7 | 20.3 | 77.4 | 58.7 | 44.7 |
| Superior pole of the patella | 29.7 | 75.8 | 24.2 | 70.3 | 57.9 | 49.0 |
| Inferior pole of the patella | 22.5 | 72.4 | 27.6 | 77.5 | 52.9 | 40.4 |
| Tibial tuberosity | 18.2 | 88.0 | 12.0 | 81.8 | 72.7 | 37.9 |
| Superior pole of the calcaneus | 22.2 | 79.4 | 20.6 | 77.8 | 53.3 | 49.1 |
| Inferior pole of the calcaneus | 26.7 | 84.4 | 15.6 | 79.0 | 61.5 | 47.4 |