Fig. 3From: COVID-19 ICU mortality prediction: a machine learning approach using SuperLearner algorithmVariable importance plots. The ten most important predictors are reported in the plots. Abbreviations: PaO2/FiO2, arterial partial pressure of oxygen to inspired oxygen fraction ratio; SOFA, Sequential Organ Failure Assessment; CCI, Charlson Comorbidity Index; GCS, Glasgow Coma Scale; PPS, Palliative Performance Score.Back to article page