. 2014 Nov 14;14:590. doi: 10.1186/s12879-014-0590-4

Table 3.

Incidence of nosocomial Staphylococcus aureus bloodstream infection and estimated annual number of cases nationwide

Age group		Actual number			Total patient-days for 22 hospitals			Incidence of SA BSI (per 1,000 patient-days)			Total patient-days for 92 hospitals			Estimated annual number of SA-BSI cases
		Male	Female	Total	Male	Female	Total	Male	Female	Total	Male	Female	Total	Male	Female	Total
Total	MRSA	167	87	254	3,273,055	2,987,471	6,260,525	0.15	0.09	0.12	12,865,024	11,342,270	24,207,293	1969	991	2946
Total	MSSA	41	44	85	3,273,055	2,987,471	6,260,525	0.04	0.04	0.04	12,865,024	11,342,270	24,207,293	483	501	986
0-9	MRSA	6	7	13	389,736	292,724	682,460	0.05	0.07	0.06	1,272,094	960,391	2,232,485	59	69	128
0-9	MSSA	3	5	8	389,736	292,724	682,460	0.02	0.05	0.04	1,272,094	960,391	2,232,485	29	49	79
10-19	MRSA	4	0	4	157,139	97,236	254,375	0.08	0.00	0.05	543,108	333,271	876,379	41	0	41
10-19	MSSA	0	1	1	157,139	97,236	254,375	0.00	0.03	0.01	543,108	333,271	876,379	0	10	10
20-29	MRSA	2	1	3	156,072	160,269	316,341	0.04	0.02	0.03	568,594	591,027	1,159,621	22	11	33
20-29	MSSA	0	2	2	156,072	160,269	316,341	0.00	0.04	0.02	568,594	591,027	1,159,621	0	22	22
30-39	MRSA	8	4	12	208,994	291,053	500,048	0.11	0.04	0.07	804,148	1,062,531	1,866,679	92	44	134
30-39	MSSA	3	0	3	208,994	291,053	500,048	0.04	0.00	0.02	804,148	1,062,531	1,866,679	35	0	34
40-49	MRSA	9	8	17	375,999	383,098	759,097	0.07	0.06	0.07	1,501,241	1,464,574	2,965,815	108	92	199
40-49	MSSA	4	4	8	375,999	383,098	759,097	0.03	0.03	0.03	1,501,241	1,464,574	2,965,815	48	46	94
50-59	MRSA	38	10	48	599,353	478,517	1,077,870	0.19	0.06	0.13	2,392,430	1,898,890	4,291,320	455	119	573
50-59	MSSA	13	9	22	599,353	478,517	1,077,870	0.07	0.06	0.06	2,392,430	1,898,890	4,291,320	156	107	263
60-69	MRSA	48	11	59	660,593	515,558	1,176,151	0.22	0.06	0.15	2,774,688	2,005,009	4,779,697	605	128	719
60-69	MSSA	13	9	22	660,593	515,558	1,176,151	0.06	0.05	0.06	2,774,688	2,005,009	4,779,697	164	105	268
70-79	MRSA	34	29	63	568,375	554,828	1,123,203	0.18	0.16	0.17	2,311,691	2,156,892	4,468,583	415	338	752
70-79	MSSA	4	11	15	568,375	554,828	1,123,203	0.02	0.06	0.04	2,311,691	2,156,892	4,468,583	49	128	179
>80	MRSA	18	17	35	156,794	214,188	370,981	0.34	0.24	0.28	697,029	869,686	1,566,715	240	207	443
>80	MSSA	1	3	4	156,794	214,188	370,981	0.02	0.04	0.03	697,029	869,686	1,566,715	13	37	51

Abbreviations: MRSA Methicillin-resistant S. aureus, MSSA Methicillin-susceptible S. aureus, SA-BSI S. aureus bloodstream infection.