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Table 1 Baseline characteristics

From: Vitamin D: a possible modifying factor linking obesity to vascular calcification in hemodialysis patients

Clinical characteristics Total (n = 213) Obesity (+)a Obesity (−)  
(n = 109, 51.1%) (n = 104, 48.9%) p
Age (years) 63.7 ± 13.4 66.4 ± 13.0 60.8 ± 13.3 0.002
Gender, female, n (%) 68 (31.9) 47 (43.1) 21 (20.2) <0.001
BMI (kg/m2) 23.8 ± 4.1 25.2 ± 4.3 22.2 ± 3.2 <0.001
 BMI ≥ 25 kg/m2, n (%) 72 (33.8) 52 (47.7) 20 (19.2) <0.001
Systolic BP (mmHg) 146.0 ± 20.8 147.3 ± 21.4 144.8 ± 20.3 0.416
Diastolic BP (mmHg) 82.1 ± 10.9 81.4 ± 11.1 83.4 ± 10.2 0.301
Coronary artery disease, n (%) 39 (18.3) 24 (22.0) 15 (14.4) 0.064
Causes of ESRD 0.044
 Diabetes, n (%) 135 (63.8) 75 (68.8) 60 (57.7)  
 Hypertension (%) 53 (83.6) 27 (24.8) 26 (25.0)  
 Glomerulonephritis, n (%) 13 (6.1) 1 (0.9) 12 (11.5)  
 Others, n (%) 12 (5.6) 6 (5.5) 6 (5.8)  
Body composition analysis
 PBF (%) 30.0 ± 10.5 37.5 ± 5.4 21.3 ± 7.8 <0.001
 Fat tissue index (FTI) 9.7 ± 4.4 12.7 ± 3.5 6.5 ± 2.6 <0.001
Baseline laboratory findings
 Hemoglobin (g/dL) 8.9 ± 1.6 9.1 ± 1.5 8.7 ± 1.6 0.132
 Serum albumin (g/dL) 3.57 ± 0.56 3.64 ± 0.54 3.49 ± 0.57 0.076
 Total calcium (mg/dL) 8.1 ± 0.9 8.1 ± 0.9 8.0 ± 0.8 0.267
 Corrected calcium (mg/dL) 7.9 ± 1.8 7.9 ± 1.8 7.8 ± 1.8 0.585
 Phosphorus (mg/dL) 5.2 ± 0.83 5.2 ± 1.6 5.3 ± 2.0 0.400
 Intact PTH 233.0 ± 171.5 236.9 ± 162.3 228.7 ± 182.0 0.743
 Total cholesterol (mg/dL) 158.5 ± 42.9 162.8 ± 45.5 153.8 ± 39.7 0.152
 HDL- cholesterol (mg/dL) 43.5 ± 14.4 41.3 ± 12.9 45.8 ± 15.5 0.035
 LDL- cholesterol (mg/dL) 93.4 ± 33.7 99.1 ± 36.0 87.2 ± 29.9 0.022
 Triglyceride (mg/dL) 124.6 ± 68.9 141.3 ± 73.2 106.6 ± 59.3 0.001
 ln_hs-CRP 0.43 ± 1.24 0.68 ± 1.31 0.13 ± 1.10 0.002
 25 (OH) vitamin Da 4.4 (2.2-8.0) 3.8 (2.2-6.7) 6.1 (2.6-10.1) 0.002
   < 3 ng/mL 73 (34.3) 44 (40.4) 29 (27.9) <0.001
  3-10 ng/mL 90 (42.3) 53 (48.6) 37 (35.6)  
  10-20 ng/mL 48 (22.5) 12 (11.0) 36 (34.6)  
   ≥ 20 ng/mL 2 (0.9) 0 (0.0) 2 (1.9)  
 1, 25 (OH) vitamin Da 17.8 (12.1-22.7) 18.0 (12.1-25.5) 17.5 (12.8-21.6) 0.554
 ln_leptin 1.86 ± 1.52 2.62 ± 1.07 0.86 ± 1.46 <0.001
  1. adefined as a PBF(%) ≥ gender specific median value. Abbreviations: BMI body mass index, WBC white blood cell, HDL high-density lipoprotein, LDL low-density lipoprotein, hs-CRP high-sensitivity C-reactive proteina median with IQR range