Table 4.

Significant features of logistic regression (p<0.05) and top 6 features of machine learning algorithms for mortality and ICU models

Logistic	Random Forests	Xgboost	SVM	Neural Network
Mortality
Age	Age	Age	Age	CKD
Heart Failure	D-Dimer	D-Dimer	D-Dimer	Ferritin
LDH	CRP	COPD	Procalcitonin	Age
CRP	LDH	CRP	CRP	Respiratory Rate
Hypertension	Procalcitonin	Procalcitonin	Lymphocytes	ALT
Immunosuppression	Lymphocytes	LDH	LDH	LDH
ICU
CRP	Procalcitonin	LDH	Procalcitonin	SpO2
LDH	LDH	Procalcitonin	LDH	Heart Rate
SpO2	CRP	CRP	CRP	Age
Heart Failure	SpO2	SpO2	Ferritin	Ferritin
Smoking	Temperature	Temperature	SpO2	LDH
SBP	Ferritin	Ferritin	lymphocytes	CRP

ALT: Alanine aminotransferase, LDH: lactate dehydrogenase, CRP: C-reactive protein, SBP: systolic blood pressure. COPD: chronic obstructive pulmonary.