| U/S | Interpretation | Clinical examination | |
| Improved (N = 38) | Not improved (N = 2) | ||
| Improved (N = 35) | 35 | 0 | |
| Not improved (N = 5) | 3 | 2 | |
| Sensitivity | 92.1% | ||
| Specificity | 100% | ||
| PPV | 100% | ||
| NPV | 40% | ||