Sensitivity and specificity of the nerve cross-sectional area in relation to the nerve conduction study results in all studied nerves
| Nerves | Measuring site | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) | Area under the curve | P value |
| Median | CT | 18.0 | 95.9 | 84.6 | 48.5 | 0.514 | 0.796 |
| MF | 3.3 | 95.9 | 50.0 | 44.3 | 0.579 | 0.157 | |
| MH | 3.3 | 95.9 | 50.0 | 44.3 | 0.451 | 0.378 | |
| AX | 11.5 | 93.9 | 70.0 | 46.0 | 0.385 | 0.038 | |
| Ulnar | GY | 1.7 | 100.0 | 100.0 | 45.9 | 0.375 | 0.025 |
| MF | 6.7 | 96.0 | 66.7 | 46.2 | 0.471 | 0.606 | |
| MA | 3.3 | 96.0 | 50.0 | 45.3 | 0.466 | 0.536 | |
| AX | 5 | 98 | 75 | 46.2 | 0.544 | 0.433 | |
| Tibial | POP | 7.7 | 98.0 | 75.0 | 66.0 | 0.536 | 0.532 |
| DL | 10.3 | 98.6 | 80.0 | 66.7 | 0.454 | 0.429 | |
| TT | 2.6 | 97.2 | 33.3 | 64.5 | 0.412 | 0.129 | |
| Peroneal | POP | 7.7 | 91.7 | 22.2 | 76.2 | 0.439 | 0.349 |
| FNB | 11.5 | 95.2 | 42.9 | 77.7 | 0.545 | 0.493 | |
| DPN | 0.0 | 97.6 | 0.0 | 75.9 | 0.443 | 0.383 | |
| Sural | 4.0 | 96.7 | 50.0 | 54.7 | 0.530 | 0.585 |
AX, axial; CT, carpal tunnel inlet; DPN, deep peroneal nerve; FNB, fibular neck bone; GY, Guyon’s canal; MA, mid arm; MF, mid-forearm; MH, mid-humerus; POP, popliteal; TT, tarsal tunnel.