Table 3.

The receiver operating characteristic curve for the serum HO-1 level (predicting hospital death among patients having an AE).

Variable	Area under the ROC curve	Best cut-off values	Sensitivity (%)	Specificity (%)	p value
Serum hemeoxygenase-1 (ng/mL)	0.81	64.8	67	86	0.025
Serum lactate dehydrogenase (U/L)	0.57	273	100	29	0.806
PaO2/FiO2 ratio	0.58	340	100	33	0.506
Serum surfactant protein-A (ng/mL)	0.57	116	60	83	0.550
Serum surfactant protein-D (ng/mL)	0.81	231	83	67	0.055
Serum KL-6 (U/mL)	0.56	1821	83	50	0.617
Ground glass opacity score	0.77	8	100	57	0.062
Honeycomb score	0.56	7	50	71	0.912