Postintubation Decline in Oxygen Saturation Index Predicts Mortality in COVID-19: A Retrospective Pilot Study

Table 4

Comparison of areas under the receiver operating characteristic curve for discrimination of hospital survival.

Day 0	AUC	95% CI
Lung compliance	0.584	(0.421, 0.748)
PaO2/FiO2	0.544	(0.394, 0.694)
Oxygenation index	0.569	(0.417, 0.721)
SpO2/FiO2	0.573	(0.426, 0.719)
Oxygen saturation index	0.605	(0.461, 0.750)
Day 3	AUC	95% CI
Lung compliance	0.625	(0.459, 0.790)
PaO2/FiO2	0.708	(0.573, 0.843)
Oxygenation index	0.684	(0.546, 0.822)
SpO2/FiO2	0.674	(0.532, 0.816)
Oxygen saturation index	0.655	(0.514, 0.797)
Day 7	AUC	95% CI
Lung compliance	0.680	(0.525, 0.835)
PaO2/FiO2	0.775	(0654, 0.896)
Oxygenation index	0.808	(0.697, 0.919)
SpO2/FiO2	0.830	(0.721, 0.939)
Oxygen saturation index	0.828	(0.724, 0.932)