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Table 1 Clinical characteristics of the diabetic patients examined according to impaired versus unimpaired DML and CV of the median nerve for both hands

From: Median nerve conduction impairment in patients with diabetes and its impact on patients’ perception of health condition: a quantitative study

  Distal motor latency (mean ± SD ms) (DML) Conduction velocities (mean ± SD m/s) (CV)
  Left hand Right hand Left hand Right hand
  Unimpaired Impaired   Unimpaired Impaired   Unimpaired Impaired   Unimpaired Impaired P value
  N = 30 N = 41 P value N = 22 N = 49 P value N = 48 N = 23 P value N = 41 N = 30  
  Mean = 3.4 ±0.2 ms Mean = 4.6 ± 0.9 ms   Mean = 3.4 ± 0.3 ms Mean = 4.9 ± 1.2 ms   Mean = 54.5 ± 3.5 m/s Mean = 46.1 ± 2.8 m/s   Mean = 54.1 ± 3.4 m/s Mean = 45.8 ± 2.7 m/s  
Age (years) 51.3 ± 16.8 56.9 ± 12.1 ns 52.3 ± 16.4 55.7 ± 13.3 ns 54.7 ± 15.4 54.4 ± 12.3 ns 52.8 ± 14.9 57.0 ± 13.4 ns
Gender             ns
Women N(%) 17(56.7%) 20(48.8%) ns 10(45.5%) 27(55.1%) ns 29(60.4%) 8(34.8%) 0.002 22(53.7%) 15(50%)  
Men N(%) 13(43.3%) 21(51.2%)   12(54.5%) 22(44.9%)   19(39.6%) 15(65.2%)   19(46.3%) 15(50%)  
Type of diabetes             ns
Type I N(%) 12(40%) 9(21.9%) ns 7(31.8%) 14(28.6%) ns 14(29.2%) 7(30.4%) ns 12(29.3) 9(30%)  
Type II N(%) 18(60%) 32(78.1%)   15(68.2%) 35(71.4%)   34(70.8%) 16(69.6%)   29(70.7%) 21(70%)  
Duration of diabetes (yrs) 13.6 ± 9.4 14.5 ± 11.1 0.03 12.5 ± 8.6 14.8 ± 11.1 ns 13.8 ± 11.1 14.7 ± 8.7 ns 12.2 ± 8.2 16.6 ± 12.3 ns
Hb A1C (%) 8.4 ± 2.9 9.3 ± 1.9 ns 9.2 ± 2.2 8.8 ± 1.9 ns 8.4 ± 1.7 9.8 ± 2.1 0.004 8.5 ± 1.8 9.4 ± 2.1 0.05
BMI (kg/m2) 30.5 ± 15.2 27.9 ± 4.9 ns 31.3 ± 17.2 28.0 ± 5.1 ns 29.3 ± 8.4 28.5 ± 6.6 ns 30.5 ± 13.1 27.1 ± 4.9 ns
  1. Data are presented as means ± SD or%; group comparisons (impaired vs. unimpaired) were made using the odds ratio test for non-normally distributed continuous variables and the chi-square test for categorical variables; BMI = body mass index, Hb A1C = c-fraction of glycosylated hemoglobin. P values are expressed if they are <0.05.