Differential outcome of an antimicrobial stewardship audit and feedback program in two intensive care units: a controlled interrupted time series study

Table 5 Comparison of clinical outcomes in each intervention unit in the pre- and post-intervention periods.

Unit	Variable	Pre-intervention	Post-intervention	p-value
TNICU
	Discharges	n = 1302	n = 1358
	ICU mortality	86 (7)	115 (8)	0.069
	ICU length of stay in days, mean (SD)	4.7 (0.6)	4.6 (0.6)	0.38 ^a
	Readmission to unit within 48 hours	17 (2)	19 (2)	0.81
MSICU
	Discharges	n = 1247	n = 1307
	ICU mortality	140 (11)	147 (11)	0.99
	ICU length of stay in days, mean (SD)	5.5 (0.8)	5.4 (1.0)	0.76 ^a
	Readmission to unit within 48 hours	28 (3)	33 (3)	0.62

Data are number (%) unless otherwise indicated. All p-values calculated using Chi-square unless otherwise noted. SD = standard deviation; TNICU, trauma and neurosurgery intensive care unit; MSICU, medical surgical intensive care unit.
^aWilcoxon rank sum test

ISSN: 1471-2334