Table 4.
Additional ligament lesions found in MRI and arthroscopy (ASC)
| MRI/ASC | Sensitivity | Specificity | PPV | NPV | |
|---|---|---|---|---|---|
| CFL | 4/5 | 80.0% (CI 30–99) |
100% (CI 83–100) |
100% (CI 40–100) |
96.0% (CI 78–100) |
| PTFL | 3/1 | 100% (CI 5–100) |
86.7% (CI 76–99) |
33.3% (CI 2–87) |
100% (CI 84–100) |
| Deltoid lig. | 5/0 | – | 83.3% (CI 65–94) |
0% (CI 0–54) |
100% (CI 83–100) |
| Basset lig. | 1/8 | 0 (CI 0–40) |
94.7% (CI 75–99) |
0% (CI 0–95) |
71.9% (CI 53–87) |
| Cervical lig. | 1/0 | – | 96.2% (CI 81–99) |
0% (CI 0–95) |
100% (CI 85–100) |
| Total | 14/14 | 28.4% (CI 10–58) |
37.8% (CI 16–64) |
29.3% (CI 10–58) |
38.4% (CI 16–64) |
Reliability of MRI is given by calculating specificity, sensitivity, positive predictive value (PPV), negative predictive value (NPV). All data are shown with 95% confidence interval (CI), CFL calcaneofibular ligament, PTFL posterior talofibular ligament, lig. ligament