Table 2.
Electrophysiological features, sensitivity, and specificity.
| Reference group (n = 47) | Patients (n = 162) | |||||
|---|---|---|---|---|---|---|
| Mean ± SD | ULN/LLN† | Mean ± SD | Sens (%) | Spec (%) | AUC | |
| DIG1 (ms) | 0.16 ± 0.19* | 0.54 | 1.12 ± 0.73* | 79.4 | 97.9 | 0.899 |
| DIG4 (ms) | 0.06 ± 0.14* | 0.34 | 1.24 ± 0.95* | 85.2 | 100 | 0.943 |
| PALM3 (m/s) | 5.64 ± 5.96* | 17.6 | 25.3 ± 10.8* | 81.8 | 100 | 0.931 |
| DML-APB (ms) | 3.36 ± 0.32* | 4.0 | 5.23 ± 1.86* | 71.0 | 100 | 0.900 |
| 2L-INT (ms) | 0.08 ± 0.53* | 1.13 | 1.86 ± 1.79* | 58.2 | 95.7 | 0.874 |
| TLI-APB | 0.32 ± 0.03* | 0.25 | 0.21 ± 0.06* | 81.3 | 97.9 | 0.950 |
| TLI-LUMB | 0.39 ± 0.04* | 0.30 | 0.28 ± 0.09* | 69.5 | 95.7 | 0.858 |
| RML-APB | 2.27 ± 0.30* | 2.86 | 4.11 ± 1.80* | 73.8 | 100 | 0.911 |
| RML-LUMB | 1.99 ± 0.39* | 2.77 | 3.63 ± 1.67* | 66.9 | 95.7 | 0.860 |
Numbers may vary due to missing values or not recordable SNAPs or CMAPs.
p ≤ 0.01.
LLN applies to TLI-APB and TLI-LUMB only.
ULN, upper limit of normal; LLN, lower limit of normal; AUC, area under the curve; DIG1, sensory median-radial comparison test; DIG4, sensory median-ulnar comparison test; PALM3, sensory short segment forearm-wrist vs. wrist-to-palm segment; DML-APB, distal motor latency to the abductor pollicis brevis muscle; 2L-INT, lumbrical-interosseous comparison study; TLI-APB, terminal latency index abductor pollicis brevis muscle; TLI-LUMB, terminal latency index lumbrical muscle; RML-APB, residual motor latency abductor pollicis brevis muscle; RML-LUMB, residual motor latency lumbrical muscle.