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Table 5 Cox proportional hazards model of significant predictors for in-hospital mortality

From: An international multicenter retrospective study of Pseudomonas aeruginosa nosocomial pneumonia: impact of multidrug resistance

Variable Hazards ratio (95% CI) P -value
Heart failure 1.88 (1.39, 2.52) <0.001
Age (increasing increments of 1 year) 1.02 (1.01, 1.03) 0.001
Country of origin, Germany 3.05 (1.87, 4.96) <0.001
Country of origin, Italy 2.38 (1.41, 4.02) 0.001
Country of origin, Spain 1.91 (1.16, 3.14) 0.011
Mechanical ventilation 1.88 (1.02, 3.48) 0.044
Bacteremia 1.67 (1.20, 2.31) 0.002
Multidrug resistance 1.39 (1.05, 1.83) 0.021
No vasopressors 0.61 (0.43, 0.87) 0.006
Healthcare associated pneumonia 0.50 (0.35, 0.73) <0.001
  1. Variables excluded from the model for co-linearity: aminoglycoside resistance, carbapenem resistance, fluoroquinolone resistance, penicillin-β-lactamase inhibitor resistance (co-linear with multidrug resistance); country of origin - United States (co-linear with France, Germany, Italy, and Spain). Variables included but not retained in the model at P <0.05: ICU admission, chronic kidney disease, chronic liver disease, country of origin - France.