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Table 1 The demographic data of the ESRD patients with and without RLS

From: Restless legs syndrome in end stage renal disease patients undergoing hemodialysis

   Patients with ESRD, N (%)  
Variables   RLS –(n = 109) RLS +(n = 28) p value
Female   46 (42.2%) 17 (58.8%) 0.08
Age (year)   55.83 ± 13.20 54.04 ± 10.40 0.505
Educational Attainment < Middle school 7 (6.4%) 4 (23.5%)  
Middle school or vocational 70 (64.2%) 16 (57.1%)  
High school or higher 32 (29.4%) 8 (28.6%) 0.548
BMI (kg/m2) Underweight (< 18.5) 18 (16.5%) 6 (21.4%)  
Normal Range (18.5-23.9) 67 (61.5%) 18 (64.3%)  
Overweight (24.0-27.9) 20 (18.3%) 3 (10.7%)  
Obese (≥28.0) 4 (3.7%) 1 (3.6%) 0.346
Duration of Hemodialysis (week)   90 (25-132) 113.5 (39-159.75) 0.224
Frequency of Hemodialysis 3 times/week 102 (93.6%) 25 (89.3%) 0.438
Dialysis Solution Temperature 36 °C 52 (47.7%) 14 (50.0%)  
36.5 °C 46 (42.2%) 10 (35.7%)  
37 °C 11 (10.1%) 4 (15.3%) 0.991
Pre-dialysis Systolic Pressure (mmHg)   131.51 ± 20.44 125.36 ± 21.21 0.161
Pre-dialysis Diastolic Pressure (mmHg)   78.97 ± 11.46 77.86 ± 12.80 0.655
Post-dialysis Systolic Pressure (mmHg)   122.89 ± 19.88 115 ± 15.46 0.053
Post-dialysis Diastolic Pressure (mmHg)   74.60 ± 11.71 72.32 ± 11.43 0.358
Diabetes Mellitus   28 (25.7%) 9 (32.1%) 0.734
Hypertension   89 (81.7%) 24 (86.0%) 0.783
Family history non 94 (86.2%) 22 (78.6%)  
Hypertension 10 (9.2%) 3 (10.7%)  
Polycystic kidney 2 (1.8%) 3 (10.7%)  
Diabetes mellitus 3 (2.8%) 0 (0%) 0.151
Smoking Daily and regularly 28 (25.7%) 9 (32.1%) 0.493
Alcohol intake Daily and regularly 7 (6.4%) 5 (17.9%) 0.069
Tea intake Daily and regularly 43 (39.4%) 9 (32.1%) 0.477
Coffee intake Daily and regularly 18 (16.5%) 6 (21.4%) 0.58
  1. Abbreviations: ESRD end stage renal disease, RLS restless legs syndrome, RLS- without RLS, RLS+ with RLS, BMI body mass index