Table 2 Relation of clinical findings to difference in sensory nerve conduction velocity between little and index finger
From: Symptoms, signs and nerve conduction velocities in patients with suspected carpal tunnel syndrome
Clinical finding | Number of hands | Number of hands with nerve conduction measurements | Mean (SD) difference in nerve conduction velocity (m/s) | Linear regression analysis | |
|---|---|---|---|---|---|
Regression coefficienta | 95% CI | ||||
Numbness/ tingling group | |||||
0 | 347 | 221 | 6.4 (7.4) | Baseline | - |
1 | 31 | 31 | 4.0 (5.9) | −0.9 | −3.8 to 2.1 |
2 | 137 | 128 | 6.4 (9.7) | 0.2 | −1.5 to 2.0 |
3 | 32 | 27 | 3.4 (6.0) | −1.7 | −4.7 to 1.3 |
4 | 297 | 272 | 7.6 (9.6) | 0.8 | −0.6 to 2.2 |
5 | 63 | 55 | 6.4 (8.2) | 1.3 | −0.9 to 3.5 |
6 | 789 | 708 | 10.1 (9.4) | 2.8 | 1.5 to 4.0 |
7 | 110 | 100 | 12.0 (10.3) | 3.7 | 1.8 to 5.6 |
Pain group | |||||
0 | 913 | 731 | 8.8 (9.3) | Baseline | - |
1 | 91 | 83 | 5.8 (9.1) | −0.3 | −2.2 to 1.6 |
2 | 180 | 172 | 8.0 (9.0) | 0.2 | −1.2 to 1.5 |
3 | 318 | 291 | 8.4 (9.4) | −0.7 | −1.9 to 0.5 |
4 | 304 | 265 | 9.4 (9.5) | 0.2 | −1.1 to 1.5 |
Tinel’s test | |||||
Negative | 1110 | 949 | 7.2 (8.7) | Baseline | - |
Positive | 451 | 395 | 12.4 (9.7) | 2.5 | 1.6 to 3.5 |
Missing | 245 | 198 | 7.9 (9.5) | −1.6 | −6.2 to 2.9 |
Phalen’s test | |||||
Negative | 696 | 574 | 5.2 (7.7) | Baseline | - |
Positive | 865 | 771 | 11.2 (9.6) | 3.3 | 2.3 to 4.3 |
Missing | 245 | 197 | 8.0 (9.5) | 3.9 | −2.2 to 9.9 |
Thumb weakness b | |||||
Negative | 1403 | 1218 | 8.6 (9.2) | Baseline | - |
Positive | 162 | 132 | 9.2 (10.0) | −0.7 | −2.1 to 0.7 |
Missing | 241 | 192 | 8.1 (9.5) | −0.4 | −7.3 to 6.4 |