Table 3.

Results of multivariable logistic regression for final ARDS prediction model from derivation cohort (N=224)

Variable	Regression Coefficient (β)	Standard Error
APACHE II Score	0.067	0.025
Injury Severity Score	0.028	0.018
Blunt Injury	1.300	0.543
Pulmonary Contusion	0.599	0.361
Massive Transfusion	0.847	0.538
Flail Chest	1.877	1.172
Age (Years)	0.022	0.010
Constant	-5.087	0.815

$\text{Predicated ARDS risk}={\frac{1}{1+e}}^{-\left(\mathrm{logit}\right)}$