Table 3.

Comparison of the incidence densities of HAIs in elderly and non-elderly patients

Variable	Elderly (≥60 years)			Non-elderly (< 60 years)			RR	95% CI	P
	No. of cases	Ventilator/central line/urinary catheter days	Incidence density (per 1000 days)	No. of cases	Ventilator/central line/urinary catheter days	Incidence density (per 1000 days)
VAP	57	15,379	3.7	76	9899	7.7	0.483	0.345–0.676	0.001
CLABSI	90	39,372	2.3	75	32,561	2.3	0.992	0.730–1.348	0.959
CAUTI	170	81,760	2.1	100	62,335	1.6	1.296	1.013–1.658	0.038

CAUTI catheter-associated urinary tract infection, CLABSI central line-associated bloodstream infection, CI confidence interval, RR rate ratio, VAP ventilator-associated pneumonia