Table 1 Quantitative analysis of CSA of median nerve, wrist/forearm ratio and mean stiffness (elasticity) by ROC analysis between CTS patients and controls
Variable | Mean stiffness value (at cutoff = 65.4 kPa) | CSA by US (at cutoff = 8.5 mm2) | Wrist/forearm ratio (at cutoff = 1.3) |
|---|---|---|---|
Control (40 wrists) | 38.13 ± 23.56 | 7.2 ± 1.82 | 1.6 ± 0.41 |
Patients with CTS (56 wrists) | 95.73 ± 27.58 | 11.7 ± 2.93 | 2.5 ± 0.81 |
P value | < 0.001 | 0.01 | 0.01 |
Sensitivity (%) | 94.6 | 81 | 89 |
Specificity (%) | 97.3 | 83 | 87 |
AUC (area under curve) | 0.901 | 0.721 | 0.734 |