Table 1.
Demographic and patient characteristics
| Patient Characteristics | All Patients | Facilities 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)a | 1,062 (29,593) | 425 (13,069 = 44%) | 535 (16,282 = 55%) |
| Male | 60 | 59 | 60 |
| Residual renal function | 44 | 47 | 41 |
| Diabetesb | 37 | 35 | 38 |
| Black race | 6 | 6 | 6 |
| Comorbidities | |||
| hypertension | 81 | 82 | 80 |
| coronary artery disease | 41 | 43 | 40 |
| CVD other | 34 | 37 | 33 |
| congestive heart failure | 30 | 30 | 30 |
| peripheral vascular disease | 26 | 29 | 24 |
| cerebrovascular disease | 16 | 17 | 16 |
| psychiatric disorder | 16 | 18 | 14 |
| cancer | 13 | 14 | 12 |
| lung disease | 11 | 12 | 10 |
| neurologic disease | 10 | 11 | 10 |
| recurrent cellulitis | 8 | 8 | 7 |
| gastrointestinal bleed | 5 | 5 | 5 |
| HIV | 1 | 1 | 1 |
| Vascular access | |||
| AVF | 64 | 62 | 65 |
| catheter | 22 | 24 | 21 |
| graft | 9 | 8 | 9 |
| unknown access | 5 | 5 | 6 |
| Age (yr) | 63.0 ± 14.7 | 63.0 ± 15.0 | 63.0 ± 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 ± 1.91 | 2.95 ± 1.94 | 3.12 ± 1.89 |
| Predialysis SBP (mmHg) | 144.5 ± 24.4 | 141.8 ± 24.4 | 146.6 ± 24.3 |
| Laboratory parameters | |||
| albumin (g/dl) | 3.68 ± 0.53 | 3.70 ± 0.55 | 3.67 ± 0.52 |
| creatinine (mg/dl) | 8.7 ± 3.1 | 8.4 ± 3.0 | 8.9 ± 3.2 |
| ferritin (ng/ml) | 288 (130–538) | 305 (146–549) | 270 (116–527) |
| hemoglobin (g/dl) | 10.9 ± 1.7 | 11.1 ± 1.7 | 10.8 ± 1.7 |
| white blood cells (1000/mm3) | 7.1 ± 2.5 | 7.3 ± 2.5 | 6.9 ± 2.5 |
| predialysis SNa (mEq/L) | 138.2 ± 3.5 | 138.2 ± 3.6 | 138.3 ± 3.5 |
| Prescribed DNa (mEq/L) | 139.9 ± 1.9 | 140.0 ± 2.3 | 139.8 ± 1.4 |
| Calculated GNa (mEq/L) | 1.7 ± 3.9 | 1.8 ± 4.2 | 1.5 ± 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.