Table 1.

Patient characteristics at baselinea

HDF (n = 199)HD (n = 207)
Gender (% male)6265
Age (yr)66 (53 to 74)66 (55 to 75)
History of cardiovascular disease (%)4544
Diabetes mellitus (%)2520
Dialysis vintage (yr)1.7 (0.8 to 3.4)2.2 (1.1 to 4.1)
Body mass index (kg/m2)24.9 ± 4.725.0 ± 4.2
Systolic blood pressure (mmHg)147 ± 21150 ± 21
Diastolic blood pressure (mmHg)76 ± 1377 ± 11
Vascular access (% arteriovenous fistula)7680
Treatment time (min)240 (210 to 240)240 (210 to 240)
Blood flow (ml/min)302 ± 37299 ± 43
Dialysis Kt/Vurea1.39 ± 0.221.36 ± 0.17
RKF (%)b5855
Urinary volume (ml/24 h)c700 (288 to 1150)750 (350 to 1210)
GFR (ml/min/1.73 m2)c,d3.1 (1.3 to 5.6)3.3 (1.1 to 5.4)
Hemoglobin (mmol/L)7.4 ± 0.87.4 ± 0.7
Phosphorus (mmol/L)1.69 ± 0.521.63 ± 0.49
Albumin (g/L)36.5 ± 4.636.7 ± 4.5
β2M (mg/L)29.5 ± 1231.9 ± 13
  • a Values represent mean ± SD, median (interquartile range), or proportion (%). To convert hemoglobin in mmol/L to g/dl, divide by 0.62; phosphate in mmol/L to mg/dl, divide by 0.323; and albumin in g/L to g/dl, divide by 10.

  • b Defined as the proportion of patients with diuresis >100 ml/24 h.

  • c In selection of patients with RKF.

  • d Mean of urea and creatinine clearance.