Table 3.

Comparison of baseline characteristics among ESA responders, acute hyporesponders, and chronic hyporesponders: categorical variables

	Chronic hyporesponders (n = 3086)		Acute hyporesponders (n = 6632)		ESA responders (n = 81,504)		p-value
	N	%	N	%	N	%
Gender female	1633	52.9	3395	51.2	44,700	54.8	<0.0001
Race/ethnicity							<0.0001
American Indian	25	0.8	68	1.0	1153	1.4
Asian	94	3.1	237	3.6	3063	3.8
Black	1339	43.4	2806	42.3	30,309	37.2
Hispanic	342	11.1	961	14.5	15,162	18.6
Pacific Islander	25	0.8	49	0.7	708	0.9
Other	204	6.6	432	6.5	4222	5.2
White	1057	34.3	2079	31.4	26,887	33.0
Primary cause renal disease							<0.0001
Diabetes	1182	38.0	2769	41.8	35,969	44.1
Hypertension	901	29.2	1981	29.9	24,936	30.6
Vascular access							<0.0001
Fistula	1726	55.9	3732	56.3	53,200	65.3
Catheter	671	21.7	1579	23.8	11,382	14.0
Graft	685	22.2	1321	19.9	16,904	20.7
Other	4	0.1	0	0	17	0.02
Diabetes	1558	50.5	3389	51.1	43,279	53.1	0.0001
Hypertension	1114	36.1	2401	36.2	28,282	34.7	0.0174
Cardiac arrest	3	0.1	7	0.1	82	0.1	0.9929
Myocardial infarction	9	0.3	13	0.2	163	0.2	0.1776
COPD	160	5.2	298	4.5	3097	3.8	<0.0001
History of GI bleed	68	2.2	73	1.1	815	1.0	<0.0001
Liver disease	71	2.3	126	1.9	1304	1.6	0.0009
HIV/AIDS	28	0.9	53	0.8	326	0.4	<0.0001
Hepatitis B	22	0.7	27	0.4	245	0.3	<0.0001
Septicemia	241	7.8	484	7.3	4646	5.7	<0.0001
Pneumonia	108	3.5	206	3.1	1875	2.3	<0.0001
Anemia hemolytic/sickle cell	68	2.2	33	0.5	245	0.3	<0.0001
Myelodysplastic syndrome	40	1.3	27	0.4	82	0.1	<0.0001
Monoclonal gammopathy	22	0.7	33	0.5	326	0.4	0.0006

COPD chronic obstructive pulmonary disorder, ESA erythropoietin-stimulating agent, GI gastrointestinal, HIV/AIDS Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome

P-values represent a chi square test