Table 2.

Baseline Characteristics of 156,945 Eligible Patients, United States Renal Database System 2006–2012

Characteristic	Value
Patient demographics
Age (year; mean)	64.7
Male gender (%)	52.9
Race (%)
White	59.5
Black	34.8
Other/unknown	5.7
Patient clinical history (%)
Primary cause of renal failure
Diabetes	50.6
Hypertension	28.6
Glomerulonephritis	9.4
Other/unknown	11.4
Duration of dialysis (years)	3.3
Baseline inpatient days (mean)	1.3
Hypertension	96.4
Diabetes	66.4
Peripheral vascular disease	38.2
Angina pectoris	7.3
Congestive heart failure	62.0
Myocardial infarction	13.8
Coronary artery bypass graft	5.8
Percutaneous transluminal coronary angloplasty	9.6
Anemia management prior to baseline
Hematocrit (%, mean)	35.3
EPO dose (units/administration, mean)	7,630
Iron use (%)	64.1
Facility characteristics (%)
Geographic region
Northeast (Networks 1–5)	24.3
Southeast (Networks 6–8, 13, 14)	37.5
Midwest (Networks 9–12)	21.5
West (Networks 15–18)	16.7
Dialysis facility chain group
DaVita	31.3
Fresenius	32.7
DCI	4.1
Small chains	12.9
Nonchain	19.0