Table 3 Difference between sensory nerve conduction velocities in the little and index fingers according to combinations of clinical findings
From: Symptoms, signs and nerve conduction velocities in patients with suspected carpal tunnel syndrome
Numbness/tingling groupa | Tinel’s test | Phalen’s test | Number of hands | Aggregate category | Number of hands with nerve conduction measurements | Mean (95% CI) difference between SNCbvelocities in the little and index fingers (m/s) |
|---|---|---|---|---|---|---|
0 | Negative | Negative | 232 | A | 144 | 5.0 (3.9 to 6.1) |
0 | Negative | Positive | 40 | B | 51 | 9.7 (7.7 to 11.8) |
0 | Positive | Negative | 8 | B | ||
0 | Positive | Positive | 18 | B | ||
1, 2 | Negative | Negative | 76 | C | 75 | 3.6 (1.9 to 5.3) |
1, 2 | Negative | Positive | 40 | D | 60 | 8.9 (6.3 to 11.5) |
1, 2 | Positive | Negative | 2 | D | ||
1, 2 | Positive | Positive | 22 | D | ||
3-5 | Negative | Negative | 137 | E | 127 | 3.3 (2.1 to 4.5) |
3-5 | Negative | Positive | 106 | F | 106 | 8.7 (6.9 to 10.5) |
3-5 | Positive | Negative | 9 | F | ||
3-5 | Positive | Positive | 85 | G | 72 | 10.6 (8.4 to 12.9) |
6-7 | Negative | Negative | 195 | H | 177 | 6.6 (5.3 to 7.8) |
6-7 | Negative | Positive | 275 | I | 282 | 10.6 (9.5 to 11.6) |
6-7 | Positive | Negative | 32 | I | ||
6-7 | Positive | Positive | 274 | J | 241 | 13.8 (12.6 to 15.0) |