Table 1.

Baseline characteristics among races in the propensity score matched cohort^a,^b

	Total	Caucasian	African–American	Korean	p –valuec
N	30,000	10,000	10,000	10,000
Propensity score	0.42±0.31	0.27±0.23	0.32±0.23	0.68±0.30
Age (yrs)	56±16	59±18	55±16	53±14	<0.001
Female (%)	43	42	43	43	0.63
Diabetes (%)	37	38	37	37	0.03
HD vintage (yrs)	2.4±3.6	2.1±3.6	2.6±3.6	2.6±3.6	<0.001
BMI (kg/m2)	22.1±3.7	22.5±4.0	22.3±3.9	21.4±3.0	<0.001
Creatinine (mg/dL)	9.2±4.2	8.0±3.1	9.5±3.8	9.9±6.9	<0.001
Hemoglobin (g/dL)	10.3±1.4	10.7±1.2	10.6±1.3	9.5±1.4	<0.001
Albumin (g/dL)	3.6±0.6	3.6±0.5	3.6±0.6	3.6±0.6	0.43
Single pool Kt/V	1.41±0.31	1.44±0.30	1.42±0.30	1.37±0.33	<0.001
nPNA (g/kg/day)	0.93±0.26	0.93±0.26	0.92±0.26	0.93±0.25	0.27

^aBMI = body mass index; HD = hemodialysis; nPNA = normalized protein nitrogen appearance

^bCategorical variables are given as percentage; continuous variables as mean ± standard deviation. Conversion factors for units: hemoglobin and serum albumin in g/dL to g/L, ×10; creatinine in mg/dL to μmol/L, ×88.4

^cp–value indicates one–way ANOVA for continuous variables and chi–square test for categorical variables.