Table 1. Risk group sociodemographics.

	Negative	Viral Infection	Coincident Infection	Bacterial Infection	p-values
	N = 190,386	N = 370	N = 328	N = 18, 611
Gender
Male	53.2%	52.4%	53.1%	53.9%	0.28
Female	46.8%	47.6%	46.9%	46.1%	0.28
Race
White	68.8%	66.9%	65.1%	65.7%	<0.0001
Black	15.3%	16.3%	15.3%	17.9%	<0.0001
Hispanic	7.0%	8.9%	7.3%	6.6%	0.19
Asian	2.4%	2.7%	5.5%	2.8%	<0.0001
Others	6.6%	5.2%	6.7%	6.9%	0.16
Age (yrs)
18∼20	3.0%	1.1%	2.4%	2.1%	<0.0001
21∼30	9.7%	7.6%	4.3%	6.7%	<0.0001
31∼40	10.4%	10.0%	7.9%	7.8%	<0.0001
41∼50	15.9%	17.3%	17.1%	13.5%	<0.0001
51∼60	20.3%	29.5%	27.1%	20.6%	<0.0001
61∼70	19.0%	18.9%	22.6%	20.9%	<0.0001
71∼80	14.3%	10.3%	12.5%	17.7%	<0.0001
>80	7.4%	5.4%	6.1%	10.6%	<0.0001
Mean Age	54.8	54.8	56.7	58.7
Median Age	56	55	58	60
Maximum Age	108	91	96	107
Minimum Age	18	18	19	18
Insurance Status
Commercial/Private	37.4%	33.8%	32.0%	27.1%	<0.0001
Medicaid	11.5%	19.2%	18.3%	14.2%	<0.0001
Medicare	35.9%	34.1%	36.6%	45.4%	<0.0001
State Assisted Healthcare	1.2%	1.4%	1.5%	1.0%	0.02
Military	1.4%	0.8%	1.5%	1.2%	0.13
Auto Insurance	2.2%	1.4%	0.9%	2.2%	0.25
Workers Compensation	1.6%	1.4%	2.1%	1.2%	0.0008
Research	0.03%	0%	0%	0.03%	0.97
Title V Maternal & Child Health	0.03%	0%	0%	0.06%	0.37
County Medically Indigent  Services	1.0%	0.8%	1.2%	0.9%	0.62
Charity	1.0%	1.6%	0.9%	0.9%	0.27
Self-Pay	5.1%	3.5%	3.7%	3.9%	<0.0001
Other NOS	1.0%	1.4%	0.9%	1.2%	0.004
Unknown	0.7%	0.8%	0.3%	0.7%	0.62