Table 1.

Patient characteristics at baseline

HD (n=356)HDF (n=358)
Demographic
 Age (years)64±1364±14
 Sex (% male)6560
 Caucasian (%)8385
Socioeconomic status
 Employed (%)1011
 High educational statusa (%)2120
Clinical parameters
 Cause of kidney failure (%)
  Vascular2729
  Diabetes mellitus1721
  Nephritis2420
  Cystic kidney disease77
  Other/unknown2523
 Dialysis vintage (yr)2.2 (1.0–4.0)1.8 (1.0–3.8)
 Dialysis frequency (% 3×/wk)9593
 Session time (h)4.0 (3.5–4.0)4.0 (3.5–4.0)
 spKt/V urea1.4±0.21.4±0.2
 eGFR (ml/min per 1.73 m2)b3.2 (1.2–5.4)3.1 (1.7–6.2)
 BMI (kg/m2)26±525±5
 Diabetes (%)2326
 History of cardiovascular disease (%)4642
 Hemoglobin (g/dl)12±112±1
 Albumin (g/dl)3.7±0.53.7±0.5
 Phosphorus (mg/dl)5.1±1.55.1±1.6
  • Mean ± SD or median (interquartile range). To convert hemoglobin in grams per deciliter to millimoles per liter, multiply by 0.62. To convert albumin in grams per deciliter to grams per liter, multiply by 10. To convert phosphorus in milligrams per deciliter to millimoles per liter, multiply by 0.323. HD, hemodialysis; HDF, hemodiafiltration; spKt/V, urea clearance divided by volume of distribution, single pool; eGFR: estimated residual GFR; BMI, body mass index.

  • a High educational status is college or university level.

  • b In 377 patients with diuresis≥100 ml/24 h (53%).