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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Infect Control Hosp Epidemiol. 2013 Aug 23;34(10):1070–1076. doi: 10.1086/673155

TABLE 2.

Multivariable Cox Proportional Hazards Regression Model of Risk Factors Associated with Fluoroquinolone-Resistant Escherichia coli Colonization in Hospitalized Patients

Variable HR (95% CI) P
LOS before the initial sample 1.02 (1.01–1.03) .003
Admission to hospital 2 2.05 (1.12–3.74) .02
Central venous catheter 0.67 (0.40–1.13) .13
Malignancy 0.37 (0.21–0.67) .001
Receipt of cefepimea 1.05 (1.00–1.10) .048
Receipt of a first-generation cephalosporina,b 1.19 (1.10–1.29) <.001

note. CI, confidence interval; HR, hazard ratio; LOS, length of stay.

a

Modeled as a time-varying covariate.

b

Cefazolin and cephalexin.

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