Table 4. Predictor variables and its effect on 28-day outcome in the logistic regression analysis.

*Represents the variables that were included in the final analysis using the backward LR method. 

ARDS, acute respiratory distress syndrome; AKI, acute kidney injury; LR, likelihood ratio; MAP, mean arterial pressure; SOFA, Sequential Organ Failure Assessment

Predictor variable for 28-day outcome	OR (95% CI)	p-Value
Apache II	1.1 (0.98-1.10)	0.16
SOFA score	0.9 (0.70-1.06)	0.22
Age	1.0 (0.97-1.00)	0.96
Ventilator days	1.0 (0.97-1.10)	0.30
Septic shock	1.0 (0.30-2.95)	0.92
Base excess	1.0 (0.88-1.05)	0.41
Moderate-to-severe ARDS*	4.0 (1.89-8.83)	<0.001
Low MAP*	6.1 (0.94-40.33)	0.06
Any AKI*	10.9 (3.93-30.17)	<0.001