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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
  1. aAdjusted for sex, age and other variables in table.
  2. bWeakness of abduction or opposition.