Table 1.

Selected patient characteristics, hospitalizations, and unadjusted hospitalization rates by sex, 2007–2011

Characteristic	Men			Women
	Patients	Admissions	Rate (yr−1)	Patients	Admissions	Rate (yr−1)
Number	63,133	170,556	1.68	48,520	163,200	2.08
Age, yra
18–34	5%	5%	1.71	5%	6%	2.63
35–44	8%	9%	1.56	7%	8%	2.38
45–54	17%	18%	1.64	14%	15%	2.06
55–64	24%	24%	1.63	24%	24%	1.98
65–74	23%	22%	1.69	25%	24%	2.00
≥75	23%	21%	1.80	26%	22%	2.08
Race/ethnicity
Asian	3%	3%	1.24	3%	3%	1.54
Black	29%	33%	1.68	34%	39%	2.17
White	49%	47%	1.81	44%	42%	2.18
Hispanic	15%	15%	1.47	14%	14%	1.80
Other	4%	3%	1.42	4%	3%	1.76
Primary insurancea
Medicare	52%	54%	1.80	56%	57%	2.17
Medicaid	7%	8%	1.84	7%	9%	2.36
Other	41%	37%	1.49	37%	34%	1.89
Charlson comorbidity index
<4	22%	20%	1.45	18%	17%	2.00
4–5	36%	36%	1.63	36%	35%	2.00
6–7	31%	32%	1.76	34%	34%	2.11
≥8	11%	13%	2.07	13%	14%	2.34
Congestive heart failure
No	64%	50%	1.49	63%	49%	1.86
Yes	36%	50%	1.91	37%	51%	2.34
Diabetes mellitus
No	44%	33%	1.50	40%	29%	1.90
Yes	56%	67%	1.78	60%	71%	2.16
Myocardial infarction
No	85%	80%	1.62	86%	81%	2.02
Yes	15%	20%	1.93	14%	19%	2.37
Other cardiovascular comorbidity
No	85%	79%	1.60	85%	81%	2.00
Yes	15%	21%	2.02	15%	19%	2.46
Geographic regiona
Northeast	13%	14%	1.80	12%	13%	2.14
Midwest	17%	18%	1.94	17%	18%	2.46
South	43%	44%	1.70	45%	46%	2.11
West	27%	23%	1.43	26%	23%	1.77
Year of incidence
2007	20%	28%	1.58	20%	28%	1.95
2008	20%	27%	1.64	20%	26%	2.05
2009	21%	22%	1.66	21%	22%	2.08
2010	21%	16%	1.79	21%	16%	2.21
2011	18%	7%	2.04	18%	7%	2.53

^aAt time of dialysis initiation.