TABLE 4.

Multivariate Model for Predicting Acquisition of Methicillin-Resistant Staphylococcus aureus

Variable	OR (95% CI)	P
Target unit stay prior to index culture	4.95 (1.71–14.34)	.003
Primary diagnosis		.02
Respiratory disease vs cardiocirculatory disease	2.25 (1.36–3.72)
Digestive tract disease vs cardiocirculatory disease	2.39 (1.35–4.25)
Injury or trauma vs cardiocirculatory disease	1.90 (1.14–3.18)
Cerebrovascular disease vs cardiocirculatory diseasea	1.51 (0.75–3.02)
Other diagnosis vs cardiocirculatory disease	1.64 (1.02–2.62)
Peripheral vascular disease	1.54 (1.01–2.33)	.04
Receipt of solid-organ transplant	0.33 (0.20–0.54)	<.001
Receipt of mechanical ventilation with pneumonia	1.75 (1.34–2.29)	<.001
Ventricular shunting or ventriculostomyb	2.20 (1.23–3.94)	.008
Ciprofloxacin use	1.57 (1.13–2.17)	.007
Penicillin use	0.66 (0.51–0.89)	.002
Daptomycin or linezolid use	0.56 (0.35–0.89)	.01
Rifamycin use	0.38 (0.17–0.82)	.01
Cephalosporin use	0.73 (0.55–0.98)	.03
Proton pump inhibitor use	0.68 (0.52–0.89)	.006

NOTE. CI, confidence interval; OR, odds ratio.

^aThe CI for this primary diagnosis category crossed 1.00, but the category is retained in the model as part of a categorical variable.

^bAmong all patients who underwent this procedure, 37 of 69 (53.6%) had an intracranial hemorrhage.