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Table 3 Parameters of electrodiagnostic testing between CTS and DM-CTS groups

From: The diagnostic value of ultrasonography in carpal tunnel syndrome: a comparison between diabetic and non-diabetic patients

  CTS-hands DM-CTS-hands  
  (n = 81) (n = 59) pvalue
Median nerve    
  DML (ms) 5.2 ± 1.3 5.3 ± 1.2 0.35
  CMAP (mV) 8.5 ± 2.8 6.8 ± 2.7 <0.001
  MNCV (m/s) 54.6 ± 4.8 49.2 ± 5.5 <0.001
  DSL (ms) 3.4 ± 0.7 3.8 ± 1.0 0.014
  SNAP (μV) 25.5 ± 15.1 17.3 ± 12.7 0.001
  SNCV_MP (m/s) 62.1 ± 10.4 55.9 ± 12.9 0.003
  SNCV_W (m/s) 42.1 ± 7.8 38.7 ± 9.1 0.024
  SNCV_D (m/s) 20.0 ± 10.2 17.2 ± 5.6 0.116
  FW (ms) 27.0 ± 3.5 28.9 ± 3.5 0.003
  1. Abbreviations: NCV nerve conduction velocity, DML distal motor latency of median CMAP, CMAP amplitude of median CMAP, MNCV motor NCV of median CMAP, DSL distal sensory latency of median SNAP, SNAP amplitude of median SNAP, SNCV_MP sensory NCV when stimulating at the middle palms, SNCV_W sensory NCV when stimulating at the wrist, SNCV_D, velocity difference (SNCV_MP - SNCV_W) of SNCV, FW median F wave. p value was calculated by independent t-test between two groups.