Screening and control of methicillin-resistant Staphylococcus aureus in 186 intensive care units: different situations and individual solutions

Table 3 Numbers and incidence densities of methicillin-resistant Staphylococcus aureus in 186 intensive care units stratified according to screening and isolation measures

Control measures	ICUs	MRSA cases	ICU-acquired MRSA cases	Patients	Patient- days	ID of all MRSA cases^a	ID of imported MRSA cases^a	Incidence of imported MRSA cases^a	ID of ICU-acquired MRSA cases
	Number	Number	Number	Number	Number	Median (IQR)	Median (IQR)	Median (IQR)	Median (IQR)
Universal admission screening and strict SR isolation	17	676	102	24,887	112,122	5.69 (3.04-6.83)	3.74 (1.39-6.07)	1.98 (0.73-2.65)	0.71 (0.28-1.28)
Universal admission screening and SR or contact precautions	28	1,230	191	43,419	182,859	5.91 (3.02-9.88)	4.2 (2.39-9.45)	2.8 (1.31-3.37)	0.84 (0.37-1.62)
Universal admission screening and contact precautions	6	472	68	7,916	37,097	8.81	6.72	4.93	1.67
Targeted screening and strict SR isolation	57	1,298	287	98,396	341,332	2.55 (1.05-5.6)	1.87 (0.56-4.18)	0.6 (0.22-1.21)	0.42 (0.14-1.12)
Targeted screening and SR or contact precautions	30	696	169	51,054	162,083	2.91 (1.01-5.68)	1.47 (0.22-3.88)	0.62 (0.09-1.33)	0.67 (0-1.34)
Targeted screening and contact precautions	4	102	29	8,221	33,850	3.69	2.4	0.98	0.61
No screening and strict SR isolation	28	260	91	46,999	128,413	1.44 (0.05-3.34)	0.68 (0-2.19)	0.18 (0-0.91)	0.62 (0-1.03)
No screening and SR or contact precautions	14	190	68	19,715	69,517	3.31 (1.62-4.11)	2.05 (0.28-3.49)	0.73 (0.1-1.09)	1.16 (0.47-1.4)
No screening and contact precautions	2	11	2	1,917	8,091	1.37	1.12	0.47	0.24

^aSignificant difference by Kruskal-Wallis test (P < 0.001). ICU, intensive care unit; ID, incidence density; IQR, interquartile range (shown only if n > 10); MRSA, methicillin-resistant Staphylococcus aureus; SR, single room.

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