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Table 5 Nerve conduction measurements.

From: Nerve conduction in relation to vibration exposure - a non-positive cohort study

   Exposed Unexposed 95%
CI Group difference
(Exposed [all] -
Unexposed)
p-value*
   All Formerly Currently     
   Mean SD Mean SD Mean SD Mean SD   
Motor examination            
Median nerve            
Velocity (m/s) right 57.8 5.36 58.5 5.29 56.8 5.46 57.6 6.03 -1.96; 2.43 0.83
  left 60.4 6.08 61.0 6.16 59.8 5.68 61.1 7.02 -3.44; 2.01 0.60
Amplitude (wrist) (mV) right 7.61 3.28 7.48 2.82 7.83 3.92 8.14 3.26 -1.74; 0.69 0.39
  left 8.95 3.42 8.94 3.38 8.8 3.52 7.70 3.40 -0.08; 2.57 0.06
Distal latency (ms) right 4.42 0.73 4.40 0.67 4.41 0.83 4.28 0.65 -0.11; 0.39 0.28
  left 4.07 0.53 4.09 0.48 4.07 0.63 4.04 0.71 -0.23; 0.30 0.79
F-latency (ms) right 25.9 2.08 25.7 1.87 26.2 2.37 26.5 2.11 -1.37; 0.23 0.16
  left 25.8 2.11 25.7 2.07 25.8 2.16 25.5 2.04 -0.50; 1.10 0.46
Ulnar nerve            
Velocity (m/s) right 60.4 7.06 60.4 6.8 60.4 7.55 59.7 6.47 -1.83; 3.23 0.58
  left 64.0 6.52 63.8 6.82 64.2 6.19 63.5 6.39 -2.07; 2.97 0.72
Amplitude (wrist) (mV) right 11.2 2.30 11.2 2.49 11.3 2.01 11.2 2.18 -0.81; 0.86 0.95
  left 10.4 1.99 10.4 2.04 10.3 1.94 10.4 2.20 -0.85; 0.82 0.98
Distal latency (ms) right 3.36 0.46 3.35 0.43 3.37 0.51 3.38 0.41 -0.19; 0.13 0.73
  left 3.27 0.45 3.29 0.48 3.25 0.42 3.24 0.43 -0.14; 0.20 0.71
F-latency (ms) right 26.9 2.26 26.9 2.08 26.9 2.54 27.3 1.81 -1.20; 0.25 0.20
  left 26.4 2.21 26.5 2.16 26.2 2.33 26.4 2.26 -0.93; 0.81 0.89
Sensory examination            
Median nerve            
Latency, dig III-palm (ms) right 1.74 0.20 1.72 0.21 1.75 0.20 1.78 0.23 -0.15; 0.06 0.36
  left 1.71 0.19 1.71 0.21 1.71 0.15 1.74 0.27 -0.15; 0.09 0.63
Amplitude (finger) (μV) right 15.6 8.49 15.9 8.37 15.2 8.87 11.8 9.86 -0.56; 8.18 0.09
  left 17.8 10.5 18.6 11.5 16.9 9.38 15.8 9.07 -2.40; 6.43 0.36
Latency, palm-wrist (ms) right 1.58 0.26 1.54 0.24 1.61 0.29 1.64 0.43 -0.25; 0.11 0.45
  left 1.50 0.23 1.45 0.21 1.54 0.25 1.48 0.18 -0.07; 0.11 0.67
Amplitude (wrist) (μV) right 12.6 7.47 12.8 6.65 12.5 8.61 8.05 6.49 1.51; 7.60 0.004
  left 13.1 8.27 13.6 8.24 12.8 8.35 10.6 5.92 -0.58; 5.54 0.11
  1. *p-value for difference between exposed (all) and unexposed