Table 3.

Hematologic and biochemical laboratory parameters

GFR = 0 (ml/min per 1.73 m2)GFR 0 to 1.65 (ml/min per 1.73 m2)GFR 1.66 to 4.13 (ml/min per 1.73 m2)GFR > 4.13 (ml/min per 1.73 m2)All PatientsPa
n270949494552
Hemoglobin (g/dl)11.8 ± 1.312.0 ± 1.211.8 ± 1.112.0 ± 1.211.9 ± 1.20.39
Hematocrit (%)36.0 ± 4.036.4 ± 3.735.8 ± 3.536.3 ± 4.136.1 ± 3.90.60
β2M (g/L)38.9 ± 13.330.4 ± 10.428.7 ± 9.917.7 ± 6.132.1 ± 13.8<0.001
Phosphate (mg/dl)5.15 ± 1.625.51 ± 1.575.01 ± 1.424.77 ± 1.175.12 ± 1.530.008
Calcium (mg/dl)9.3 ± 0.79.2 ± 0.89.3 ± 0.79.3 ± 0.69.3 ± 0.70.41
iPTH (pg/ml)21.0 (10.0 to 38.3)28.0 (14.4 to 40.5)16.7 (7.9 to 30.8)16.1 (8.1 to 30.1)20.3 (10.0 to 35.8)0.005
Albumin (g/dl)4.0 ± 0.44.0 ± 0.44.0 ± 0.44.1 ± 0.44.0 ± 0.40.26
Ferritin (ng/ml)330 (182 to 601)386 (224 to 683)329 (210 to 546)292 (152 to 554)331 (190 to 581)0.09
TSAT (%)23 ± 1124 ± 1126 ± 1224 ± 1124 ± 110.29
  • Values expressed as mean ± SD or median (interquartile range). To convert hemoglobin in g/dl to mmol/L, multiply by 0.62; albumin in g/dl to g/L, multiply by 10; phosphate in mg/dl to mmol/L, multiply by 0.323; calcium in mg/dl to mmol/L, multiply by 0.25; ferritin from ng/ml to μg/L, multiply by 1.

  • a Between-group ANOVA.