Table 2.

Incidence density of colonization, colonization pressure and rate of colonization at ICU admission during the three study periods.

	Incidence density of colonization	Colonization pressure (range) (95% confidence interval)	Rate of colonization at admission
Pre-intervention	24.8 per 1000 patient-days	14.7 (0-28.1)	2%
		(10-20)
Post-education		38.2 (0-83.3)	16%
	43.3 per 1000 patient-days	(27-49)
Post-alcohol		53.3 (16.7-70)	18%
	67.5 per 1000 patient-days	(47-59)