Table 4.

Estimated odds ratios for patient acquiring S. aureus colonization, according to final multivariate logistic regression models.

Model, independent variables	Estimated odds ratio	95% confidence interval	p value
Methicillin-sensitive S. aureus
Age, per unit increase	0.988	(0.981, 0.995)	0.001∗
BMI, per unit increase	1.01	(1.00, 1.02)	0.578
CHF (versus no CHF)	0.662	(0.376, 1.10)	0.112
DM without complication (versus DM with complication)	0.707	(0.425, 1.12)	0.145
Female (versus male)	0.716	(0.610, 0.840)	<0.001∗
Hospital site #1 (versus hospital site #3)	0.720	(0.603, 0.858)	<0.001∗
Hospital site #2 (versus hospital site #3)	0.670	(0.526, 0.847)	<0.001∗
Methicillin-resistant S. aureus
Infection (versus no infection)	0.101	(0.00951, 2.20)	0.119
CHF (versus no CHF)	0.298	(0.168, 0.568)	<0.001∗
DM without complication (versus DM with complication)	0.583	(0.309, 1.22)	0.144
CKD (versus no CKD)	3.72	(1.12, 23.1)	0.0289∗
Hospital site #3 (versus hospital site #2)	0.653	(0.410, 1.02)	0.0593
Hospital site #1 (versus hospital site #2)	0.677	(0.428, 1.04)	0.0783
Previous Inpatient stay within 1 year (versus none)	0.619	(0.448, 0.858)	0.0032∗

^∗Denotes statistical significance.

Age and BMI were analyzed as continuous variables. All other factors were analyzed as categorical variables. Only those variables which met minimum Akaike information criterion are listed in this table.

BMI: body mass index, CHF: congestive heart failure, CKD: chronic kidney disease, and DM: diabetes mellitus.