Incidence and cost of hospitalizations associated with Staphylococcus aureusskin and soft tissue infections in the United States from 2001 through 2009

Table 2 Length of stay, average cost, incidence and cost changes of hospitalizations associated with S. aureus skin and soft tissue infections (SA-SSTI) by age group in the U.S.

	Year				Period change
	2001		2009		2001–2009
Item	Estimate	SE	Estimate	SE	% Change
SA-SSTI length of stay of hospitalization
All ages	9.91	0.16	7.26	0.11	-27%*
0–17 yrs.	8.14	0.67	4.65	0.23	-43%*
18–44 yrs	8.31	0.19	5.91	0.10	-29%*
45–64 yrs.	10.00	0.22	7.65	0.11	-23%*
65–74 yrs.	11.03	0.25	8.82	0.18	-20%*
75 plus yrs.	10.71	0.19	8.85	0.18	-17%*
SA-SSTI average cost of hospitalization
All ages	21,287	641	11,622	200	-45%*
0–17 yrs.	22,601	2,881	7,740	887	-66%*
18–44 yrs.	18,675	738	9,309	214	-50%*
45–64 yrs.	22,379	784	12,539	213	-44%*
65–74 yrs.	23,206	795	14,456	278	-38%*
75 plus yrs.	20,587 670		13,346	231	-35%*
SA-SSTI hospitalizations per 100,000 population
All ages	56.68	1.38	117	2.99	+107%*
0–17 yrs.	11.29	1.25	45.74	3.62	+305%*
18–44 yrs.	29.77	0.99	82.03	2.47	+176%*
45–64 yrs.	77.00	2.10	158.84	4.45	+106%*
65–74 yrs.	145.57	4.52	217.29	6.25	+49%*
75 plus yrs.	258.01	8.03	327.20	9.86	+27%*
National annual cost of SA-SSTI hospitalizations (in $ Billion)
All ages	3.36	0.16	4.22	0.14	+26%*
0–17 yrs.	0.16	0.03	4.22	0.14	+61%*
18–44 yrs	0.58	0.04	0.88	0.03	+51%*
45–64 yrs.	1.07	0.06	1.59	0.06	+49%
65–74 yrs.	0.62	0.04	0.66	0.02	+5%
75 plus yrs.	0.93	0.05	0.83	0.03	-10%

Note: cost estimates are in constant 2010 US dollar. Asterisk (*) denotes statistical significant differences at alpha = 0.05.

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