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Table 2 Laboratory data according to tertiles of mean rCUC

From: Positive association of residual kidney function with hemoglobin level in patients on peritoneal dialysis independent of endogenous erythropoietin concentration

  Total (N = 50) T1 (mean rCUC < 11.7 L/week/1.73m2), n = 17 T2 (mean rCUC 11.8–29.8 L/week/1.73m2), n = 17 T3 (mean rCUC ≥ 29.9 L/week/1.73m2), n = 16 P for trend
Total protein, g/dL 6.4 ± 0.7 6.5 ± 0.6 6.2 ± 0.6 6.4 ± 0.7 0.539
Albumin, g/dL 3.5 ± 0.4 3.5 ± 0.4 3.4 ± 0.5 3.6 ± 0.4 0.270
Blood urea nitrogen, mg/dL 65 ± 13 63 ± 10 68 ± 17 67 ± 12 0.460
Creatinine, mg/dL 11.5 ± 3.0 13.1 ± 3.1 11.1 ± 2.3 10.1 ± 3.0 0.003
Uric acid, mg/dL 6.8 ± 1.1 6.7 ± 1.2 6.7 ± 1.0 6.9 ± 1.1 0.341
Sodium, mEq/L 136 ± 4 134 ± 3 137 ± 3 139 ± 2 < 0.001
Potassium, mEq/L 4.4 ± 0.6 4.4 ± 0.7 4.2 ± 0.6 4.7 ± 0.5 0.306
Chloride, mEq/L 98 ± 5 94 ± 3 98 ± 4 102 ± 4 < 0.001
Calcium, mg/dL 9.5 ± 0.4 9.5 ± 0.4 9.5 ± 0.5 9.5 ± 0.4 0.643
Phosphate, mg/dL 5.4 ± 1.2 5.4 ± 1.7 5.3 ± 0.7 5.4 ± 1.2 0.894
Glucose, mg/dL 108 ± 31 112 ± 35 105 ± 26 107 ± 34 0.408
Total cholesterol, mg/dL 182 ± 44 168 ± 33 195 ± 58 183 ± 37 0.355
Triglyceride, mg/dL 126 ± 73 126 ± 84 114 ± 53 138 ± 82 0.569
LDL-C, mg/dL 96 ± 27 85 ± 22 105 ± 26 100 ± 30 0.176
HDL-C, mg/dL 52 ± 18 53 ± 14 53 ± 22 52 ± 16 0.794
Hb, g/dL 10.2 ± 1.1 9.8 ± 1.0 10.0 ± 1.2 10.9 ± 0.7 < 0.001
C-reactive protein, mg/dL 0.08 (0.03–0.13) 0.07 (0.04–0.15) 0.08 (0.03–0.22) 0.06 (0.03–0.11) 0.631
Serum iron, μg/dL 87 ± 26 84 ± 26 87 ± 31 88 ± 22 0.735
TIBC, μg/dL 283 ± 34 301 ± 34 268 ± 37 281 ± 22 0.074
TSAT, % 30.7 ± 9.3 28.2 ± 8.8 32.2 ± 10.3 31.7 ± 8.7 0.213
Ferritin, ng/mL 130 (80–220) 108 (73–205) 216 (89–306) 113 (59–177) 0.643
Whole PTH, pg/mL 94 (55–151) 89 (55–128) 92 (37–173) 97 (52–163) 0.801
BNP, pg/mL 86 (37–298) 222 (67–468) 101 (34–433) 47 (20–116) 0.023
eEPO, U/mL 16.0 (13.6–25.1) 22.1 (13.9–24.9) 17.7 (13.9–24.3) 18.6 (14.0–23.7) 0.618
BMG, mg/L 23.2 (18.1–28.8) 28.6 (26.6–37.3) 22.8 (19.9–29.6) 17.6 (14.6–18.9) < 0.001
HbA1c, % 5.4 ± 0.7 5.3 ± 0.8 5.5 ± 0.7 5.5 ± 0.8 0.128
  1. Values are expressed as mean ± standard deviation or median (interquartile range) as appropriate
  2. Abbreviations:BMG β 2-microglobulin, BNP brain natriuretic peptide, eEPO endogenous erythropoietin, Hb hemoglobin, HbA1c hemoglobin A1c, HDL-C high-density lipoprotein cholesterol, LDL-C low-density lipoprotein cholesterol, PTH parathyroid hormone, rCUC renal creatinine and urea clearance, TIBC total iron binding capacity, TSAT transferrin saturation