Table 3 Validity of parameters in the diagnosis of ACL functional integrity
Parameters | Cut-off value | Sensitivity (%) | Specificity (%) | Youden index (%) | Accuracy (%) | PLR | NLR | PPV (%) | NPV (%) | AUC [95% confidence interval (CI)] | P-value |
|---|---|---|---|---|---|---|---|---|---|---|---|
HKA (°) | 169.05 | 66.1 | 68.9 | 35.0 | 68.3 | 2.125 | 0.492 | 35.0 | 88.9 | 0.702 (0.621–0.783) | < 0.001 |
MPTA (°) | 83.05 | 41.9 | 84.8 | 26.7 | 76.1 | 2.757 | 0.685 | 40.6 | 85.1 | 0.640 (0.553–0.727) | 0.001 |
LDFA (°) | - | - | - | - | - | - | - | - | - | 0.520 (0.437–0.602) | 0.633 |
PTSPM (°) | 8.80 | 41.9 | 87.3 | 29.2 | 78.1 | 3.299 | 0.666 | 45.6 | 85.5 | 0.667 (0.587–0.746) | < 0.001 |
PTSAA (°) | 10.35 | 50.0 | 77.9 | 27.9 | 72.2 | 2.262 | 0.642 | 36.5 | 86.0 | 0.655 (0.575–0.736) | < 0.001 |
JLCAAPS (°) | 6.45 | 56.5 | 66.8 | 23.3 | 64.7 | 1.702 | 0.651 | 30.2 | 85.8 | 0.656 (0.579–0.732) | < 0.001 |
JLCAAP (°) | 3.65 | 61.3 | 57.4 | 18.7 | 58.2 | 1.439 | 0.674 | 26.8 | 85.4 | 0.606 (0.525–0.688) | 0.010 |
JLCAVS (°) | - | - | - | - | - | - | - | - | - | 0.533 (0.447–0.620) | 0.416 |
STFS (mm) | 1.74 | 35.5 | 84.8 | 20.3 | 74.8 | 2.336 | 0.761 | 37.3 | 83.8 | 0.602 (0.518–0.686) | 0.013 |
CTFSAPS (mm) | 7.48 | 74.2 | 51.6 | 25.8 | 56.2 | 1.533 | 0.500 | 28.0 | 88.7 | 0.631 (0.548–0.714) | 0.043 |
CTFSAP (mm) | 8.31 | 41.9 | 84.4 | 26.3 | 75.8 | 2.686 | 0.688 | 40.6 | 85.1 | 0.619 (0.534–0.704) | 0.004 |
CTFSVS (mm) | - | - | - | - | - | - | - | - | - | 0.564 (0.479–0.648) | 0.121 |
MWPPT%XR (%) | 63.56 | 74.2 | 81.1 | 55.3 | 79.7 | 3.926 | 0.318 | 50.0 | 92.5 | 0.793 (0.731–0.856) | < 0.001 |
MWPPT%MRI (%) | 75.48 | 85.5 | 84.8 | 70.3 | 85.0 | 5.625 | 0.171 | 58.9 | 95.8 | 0.880 (0.823–0.937) | < 0.001 |
MRI grades of ACL | - | 96.7 | 77.5 | 74.2 | 81.4 | 4.298 | 0.043 | 52.2 | 99.0 | 0.871 (0.829–0.914) | < 0.001 |