Table 2.

Demographic and patient characteristics associated with DNa

Predictor VariableDNa Estimate (95% CI) (mEq/L)
Facilities Where <90% of Patients Have the Same DNa (Individualized DNa)Facilities Where 90%–100% of Patients Have the Same DNa (Nonindividualized)
Male (versus female)−0.08 (−0.15,0.00)a0.00 (−0.04,0.03)
Residual renal function (versus no RRF)−0.17 (−0.26, −0.09)a−0.02 (−0.07,0.02)
Diabetesb−0.08 (−0.16,0.00)−0.05 (−0.09, −0.01)a
Black race (versus non-black)−0.15 (−0.32,0.03)−0.09 (−0.18,0.01)
Comorbidities
 hypertension−0.24 (−0.33, −0.15)a−0.02 (−0.06,0.03)
 coronary artery disease−0.10 (−0.18, −0.02)a0.02 (−0.02,0.06)
 CVD other0.07 (−0.01,0.15)−0.02 (−0.06,0.02)
 congestive heart failure0.03 (−0.06,0.11)0.00 (−0.04,0.04)
 peripheral vascular disease0.04 (−0.05,0.13)−0.04 (−0.09,0.01)
 cerebrovascular disease0.08 (−0.01,0.18)0.00 (−0.05,0.05)
 psychiatric disorder0.09 (0.00,0.18)0.05 (−0.01,0.10)
 cancer0.04 (−0.07,0.14)0.06 (0.01,0.12)a
 lung disease0.05 (−0.05,0.16)−0.01 (−0.07,0.06)
 neurologic disease0.03 (−0.08,0.14)−0.03 (−0.10,0.03)
 recurrent cellulitis−0.06 (−0.20,0.08)0.11 (0.03,0.19)a
 gastrointestinal bleed0.05 (−0.10,0.20)−0.03 (−0.11,0.05)
 HIV0.87 (0.39,1.36)a−0.15 (−0.42,0.12)
Vascular access
 catheter (versus AVF)0.00 (−0.10,0.09)−0.04 (−0.09,0.02)
 graft (versus AVF)0.08 (−0.06,0.21)−0.03 (−0.10,0.04)
 unknown access (versus AVF)−0.13 (−0.30,0.05)0.06 (−0.03,0.15)
Age (per 5 yr older)0.03 (0.02,0.04)a−0.01 (−0.02,0.00)a
Vintage (per 1 yr longer)0.01 (0.01,0.02)a0.00 (0.00,0.01)a
Body mass index (per 5 units higher)0.05 (0.02,0.09)a0.02 (0.00,0.04)a
Facility characteristics
 facility % Kt/V <1.2 (per 20% more)−0.06 (−0.11, −0.02)a−0.13 (−0.15, −0.10)a
 facility % phosphorus <5.5 (per 20% more)−0.24 (−0.30, −0.18)a0.01 (−0.02,0.04)
 facility % catheter use (per 20% more)−0.03 (−0.08,0.02)−0.01 (−0.04,0.02)
Laboratory parameters
 albumin (per 1 g/dl higher)−0.02 (−0.09,0.06)−0.13 (−0.17, −0.09)a
 creatinine (per 1 mg/dl higher)0.00 (−0.02,0.01)a0.00 (−0.01,0.00)
 ferritin (per 100 ng/ml higher)0.01 (0.00,0.01)0.00 (0.00,0.01)
 hemoglobin (per 1 g/dl higher)0.03 (0.01,0.05)0.01 (0.00,0.02)
 white blood cells (per 1000/mm3 higher)0.00 (−0.01,0.02)−0.01 (−0.02,0.00)a
 predialysis SNa (per 1 mEq/L higher)0.02 (0.01,0.03)a0.00 (0.00,0.01)
  • CI, confidence interval; DNa, dialysate sodium concentration (prescribed); SNa, predialysis serum sodium concentration; RRF, residual renal function; CVD, cardiovascular disease; AVF, arteriovenous fistula.

  • a Statistical significance.

  • b Diabetes as comorbid condition or cause of ESRD.