Table 1.
Baseline patient characteristics by racea
| Characteristic | Black (n = 1371) | Nonblack (n = 1528) | P |
|---|---|---|---|
| Age (yr; mean ± SD) | 56.8 ± 14.8 | 63.4 ± 15.4 | <0.0001 |
| Female gender (%) | 50 | 44 | 0.0020 |
| Vintage (yr; median [IQR]) | 2.9 (1.5 to 5.4) | 2.4 (1.2 to 4.5) | <0.0001 |
| Diabetes (%) | 38 | 35 | 0.1400 |
| Creatinine (mg/dl; mean ± SD) | 12.1 ± 3.6 | 9.6 ± 3.0 | <0.0001 |
| Albumin (g/dl; mean ± SD) | 3.88 ± 0.37 | 3.83 ± 0.36 | <0.0001 |
| Predialysis BUN (mg/dl; mean ± SD) | 68 ± 17 | 68 ± 17 | 0.4700 |
| Cholesterol (mg/dl; mean ± SD) | 178 ± 45 | 175 ± 46 | 0.0400 |
| Glucose (mg/dl; mean ± SD) | 140 ± 68 | 150 ± 73 | 0.0001 |
| Hemoglobin (g/dl; mean ± SD) | 10.1 ± 1.2 | 10.5 ± 1.0 | <0.0001 |
| URR (%; mean ± SD) | 64.0 ± 7.2 | 66.0 ± 6.5 | <0.0001 |
| Weight (kg; mean ± SD) | 76.8 ± 19.5 | 72.0 ± 17.4 | <0.0001 |
| Quetelet's index (kg/m2; mean ± SD) | 27.2 ± 2.1 | 27.2 ± 1.8 | 0.0200 |
| Resistance (Ω; mean ± SD) | 490 ± 98 | 504 ± 100 | 0.0004 |
| Reactance (Ω; mean ± SD) | 45 ± 15 | 38 ± 12 | <0.0001 |
| Phase angle (°; mean ± SD) | 5.3 ± 1.8 | 4.4 ± 1.6 | <0.0001 |
| Total body water (kg; mean ± SD) | 41.6 ± 9.5 | 40.1 ± 9.0 | <0.0001 |
| Body cell mass (kg; mean ± SD) | 27.1 ± 6.2 | 25.2 ± 5.4 | <0.0001 |
a
BUN, blood urea nitrogen; IQR, interquartile range; URR, urea reduction ratio.