Table 1.

Descriptive statistics and t test results for lab units per patient day, case mix index, safety measures, and outcome measures for the preintervention and postintervention periods

Outcomes	Pre – post		95% CI for mean difference	R	t	df
	Mean	SD
UPPD	0.48	0.46	0.13, 0.83	0.93∗	3.18∗	8
CMI	−0.03	0.09	−0.09, 0.04	0.75∗	−0.96	8
Vent wean	0.06	0.12	−0.04, 0.15	0.65	1.40	8
Readmissions	−0.01	0.03	−0.03, 0.02	0.86∗	−0.48	8
Central lines	0.02	0.12	−0.07, 0.11	−0.13	0.51	8
CLABSI	0.40	0.60	−0.06, 0.86	−0.11	−1.99	8
MRSA	−0.14	0.27	−0.34, 0.07	0.55	−1.53	8
Other MDRO	−0.09	0.40	−0.40, 0.22	0.90∗	−0.66	8

^∗P < 0.05.

UPPD indicates units per patient day; CMI, case mix index; CLABSI, central line–associated bloodstream infection; MRSA, methicillin-resistant Staphylococcus aureus; MDRO, multidrug-resistant organisms.