Table 3.

Selected patient demographic data, at first HD treatment, in each dialysis unit

	Unit A (1998–2006)	Unit B (1999–2006)	Unit C (2000–2006)
Number of patients	858	515	417
Age at start of first HD treatment during the study period (years)	56.9	60.4	62.5
Gender (male: female) (%)	53.7:46.3	52.6:47.4	51.8:48.2
Race (White: Black: Other/Unknown) (%)	40.9:38.2:20.9	49.1:23.1:27.8	37.4:49.2:13.6
Hispanic (%)	19.1	17.8	13.4
Dialysis vintage ≤ 91 days (%)	41.2	41.9	65.0
Dialysis vintage > 2 years (%)	40.6	33.2	17.0
Dialysis vintage > 5 years (%)	23.9	16.3	4.7