Table 1 Variables associated with methicillin-resistant Staphylococcus aureus acquisition before and after accounting for confounding by indication

Methicillin-sensitive S. aureus carrier

0.5 (0.3, 1.0), 0.03

0.4 (0.2, 0.8), 0.01

Intubation

4.7 (1.8, 12.3), 0.002

5.3 (2.0, 14.4), 0.001

Fluoroquinolone

1.9 (1.2, 3.0), 0.01

-

Aminoglycoside

-

0.3 (0.1, 0.7), 0.003

Days from ICU admission to negative swab

< .0001

< .0001

1

1.0, reference

1.0, reference

2

2.0 (1.2, 3.3)

2.2 (1.3, 3.7)

≥ 3

15.6 (8.4, 29.0)

19.6 (10.4, 37.1)

Chronic liver disease

-

4.1 (1.2, 13.6), 0.02