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

From: Confounding by indication affects antimicrobial risk factors for methicillin-resistant Staphylococcus aureus but not vancomycin-resistant enterococci acquisition

Variable Odds ratio (95% CI), P Value
Before accounting for confounding by indicationa 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
  1. aPreviously reported elsewhere [12].