Table 3.

Cox’s multivariable regression model for predicting overall survival estimated in the derivation cohort (c-index [95% CI] = 0.826 [0.796–0.851]; baseline survival at 28 days = 99.92%)

	Derivation cohort (n = 761)
Variable	Coefficient	HR [95% CI]	p value
Age, years	0.061	1.063 [1.052–1.075]	< 0.001
Male	0.461	1.586 [1.079–2.329]	0.019
Creatinine, mg/dL	0.903	2.468 [1.824–3.339]	< 0.001
Pneumonia score, %	0.334	1.397 [1.084–1.799]	0.010
Well-aerated lung volume, dm3	−0.358	0.699 [0.581–0.841]	< 0.001
Moderate-severe main pulmonary artery diameter enlargement (≥ 31 mm)	0.465	1.592 [1.154–2.196]	0.005