Table 1.

Baseline patient characteristics

Characteristics at BaselineIn-Center Three Times per Week Chronic HemodialysisP Value
NocturnalConventional
Patients (N)7462062
Age in years [mean (SD)]52.8 (13.4)54.1 (14.4)0.03
Female (%)32.334.20.40
Race (%)0.60
 black51.048.8
 white46.348.1
 other2.73.1
Diabetes (%)47.750.70.20
Vintage in years [mean (SD)]2.9 (3.6)3.3 (4.3)0.006
Body mass index [kg/m2; mean (SD)]31.3 (8.8)30.2 (8.8)0.02
Vascular access (%)0.70
 fistula37.035.4
 graft16.918.8
 catheter45.845.6
 unknown0.30.2
Laboratory values
 albumin [g/L; mean (SD)]38 (4)38 (4)0.50
 hemoglobin [g/dl; mean (SD)]11.6 (1.4)11.7 (1.2)0.60
 phosphorus [mmol/L; mean (SD)]5.7 (1.6)5.6 (1.6)0.20
 calcium [mmol/L; mean (SD)]9.0 (0.8)9.0 (0.8)0.80
 eKt/V [mean (SD)]1.4 (0.3)1.4 (0.3)0.40
 WBC count [×1000/mcl; mean (SD)]7.4 (2.3)7.3 (2.5)0.90
  • WBC, white blood cell.