Table 1.

Demographic and patient characteristics

Patient CharacteristicsAll PatientsFacilities Where <90% of Patients Have the Same DNa (Individualized DNa)Facilities Where 90%–100% of Patients Have the Same DNa (Nonindividualized)
N facilities (N patients)a1,062 (29,593)425 (13,069 = 44%)535 (16,282 = 55%)
Male605960
Residual renal function444741
Diabetesb373538
Black race666
Comorbidities
 hypertension818280
 coronary artery disease414340
 CVD other343733
 congestive heart failure303030
 peripheral vascular disease262924
 cerebrovascular disease161716
 psychiatric disorder161814
 cancer131412
 lung disease111210
 neurologic disease101110
 recurrent cellulitis887
 gastrointestinal bleed555
 HIV111
Vascular access
 AVF646265
 catheter222421
 graft989
 unknown access556
Age (yr)63.0 ± 14.763.0 ± 15.063.0 ± 14.4
Vintage (yr)1.9 (0.3–5.5)1.6 (0.3–5.0)2.1 (0.4–5.9)
Body mass index (kg/m2)23.6 (20.7–27.2)24.3 (21.4–27.8)23.1 (20.2–26.7)
IDWG (% of body weight)3.04 ± 1.912.95 ± 1.943.12 ± 1.89
Predialysis SBP (mmHg)144.5 ± 24.4141.8 ± 24.4146.6 ± 24.3
Laboratory parameters
 albumin (g/dl)3.68 ± 0.533.70 ± 0.553.67 ± 0.52
 creatinine (mg/dl)8.7 ± 3.18.4 ± 3.08.9 ± 3.2
 ferritin (ng/ml)288 (130–538)305 (146–549)270 (116–527)
 hemoglobin (g/dl)10.9 ± 1.711.1 ± 1.710.8 ± 1.7
 white blood cells (1000/mm3)7.1 ± 2.57.3 ± 2.56.9 ± 2.5
 predialysis SNa (mEq/L)138.2 ± 3.5138.2 ± 3.6138.3 ± 3.5
Prescribed DNa (mEq/L)139.9 ± 1.9140.0 ± 2.3139.8 ± 1.4
Calculated GNa (mEq/L)1.7 ± 3.91.8 ± 4.21.5 ± 3.7
  • Continuous variables expressed as means ±SD, except non–normally distributed variables, which are expressed as median (interquartile range). Categorical variables are expressed as percentages. DNa, dialysate sodium concentration (prescribed); SNa, predialysis serum sodium concentration; GNa, dialysate–to–serum sodium gradient (calculated); IDWG, interdialytic weight gain; SBP, systolic BP; CVD, cardiovascular disease; AVF, arteriovenous fistula.

  • a Columns do not sum because only facilities with sufficient data (n≥5 data points/patients) were included in facility analyses.

  • b Diabetes as comorbid condition or cause of ESRD.