Table 4.
Results of the ROC analysis for the measured parameters.
| Parameters | AUC (95% CI) | P | Cutoff | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|---|---|---|
| AOT | 0.807 (0.693–0.922) | <.001 | 13.5 | 77.4 | 74.2 | 75.0 | 76.7 |
| IncDep | 0.689 (0.553–0.826) | .010 | |||||
| ATFL–PTFL angle | 0.767 (0.648–0.886) | <.001 | 80.5 | 64.5 | 77.4 | 74.1 | 68.6 |
| PMA | 0.569 (0.424–0.714) | .349 | |||||
| TMM | 0.920 (0.854–0.987) | <.001 | 16.5 | 77.4 | 90.3 | 88.9 | 80.0 |
| TAS/TAL | 0.704 (0.576–0.833) | .006 | 0.8 | 71.0 | 61.3 | 64.7 | 67.9 |
| TAS | 0.503 (0.356–0.649) | .972 | |||||
| TAL | 0.642 (0.502–0.781) | .056 |
Bold values indicate statistical significance at P < .05.
AOT = angle of the talus, ATFL = anterior talofibular ligament, AUC = area under the curve, CI = confidence interval, NPV = negative predictive value, PMA = plafond–malleolar angle, PPV = positive predictive value, PTFL = posterior talofibular ligament, ROC = receiver operating characteristics, TAL = the length of the trochlea tali arc, TAS = tibial articular surface, TMM = the angle between the tibial axis and medial malleolus.