Table 1.

Baseline patient characteristics by racea

CharacteristicBlack (n = 1371)Nonblack (n = 1528)P
Age (yr; mean ± SD)56.8 ± 14.863.4 ± 15.4<0.0001
Female gender (%)50440.0020
Vintage (yr; median [IQR])2.9 (1.5 to 5.4)2.4 (1.2 to 4.5)<0.0001
Diabetes (%)38350.1400
Creatinine (mg/dl; mean ± SD)12.1 ± 3.69.6 ± 3.0<0.0001
Albumin (g/dl; mean ± SD)3.88 ± 0.373.83 ± 0.36<0.0001
Predialysis BUN (mg/dl; mean ± SD)68 ± 1768 ± 170.4700
Cholesterol (mg/dl; mean ± SD)178 ± 45175 ± 460.0400
Glucose (mg/dl; mean ± SD)140 ± 68150 ± 730.0001
Hemoglobin (g/dl; mean ± SD)10.1 ± 1.210.5 ± 1.0<0.0001
URR (%; mean ± SD)64.0 ± 7.266.0 ± 6.5<0.0001
Weight (kg; mean ± SD)76.8 ± 19.572.0 ± 17.4<0.0001
Quetelet's index (kg/m2; mean ± SD)27.2 ± 2.127.2 ± 1.80.0200
Resistance (Ω; mean ± SD)490 ± 98504 ± 1000.0004
Reactance (Ω; mean ± SD)45 ± 1538 ± 12<0.0001
Phase angle (°; mean ± SD)5.3 ± 1.84.4 ± 1.6<0.0001
Total body water (kg; mean ± SD)41.6 ± 9.540.1 ± 9.0<0.0001
Body cell mass (kg; mean ± SD)27.1 ± 6.225.2 ± 5.4<0.0001
  • a BUN, blood urea nitrogen; IQR, interquartile range; URR, urea reduction ratio.