Table 2.

Comparison of VAP rates in study ICUs to all NHSN ICUs

	Study sample			NHSNa
	n	Pooled mean (SD)	Median	n	Pooled mean	Median
Type of ICU
Medical ICU	62	2.5 (5.0)	1	93	2.5	1.9
Medical/surgical teaching	99	2.3 (3.2)	1.2	79	3.3	2.3
Medical/surgical other	61	1.5 (2.4)	0	187	2.3	1.5
Surgical	57	4.6 (5.4)	3	87	5.3	4.5

^aNHSN data previously published in Edwards et al. [27].