Table 8.

Top most important features (MDI method) by input data table

ScispaCy	Imp.	TF-IDF	Imp.	TF-IDF and Bibliometric	Imp.
Pandemic	0.004	year old	0.005	case	0.005
Fever	0.003	report case	0.004	year	0.005
Patient	0.003	fever	0.004	pcr	0.004
Respiratory distress syndrome	0.003	report	0.003	old	0.003
Drug	0.002	cough	0.003	present case	0.003
Covid-19	0.002	trials	0.003	acute	0.003
Hospital	0.002	measures	0.003	report	0.003
Patient	0.002	inhibitors	0.003	sars cov	0.003
Patient covid-19	0.002	cov	0.003	personal	0.003
Cell	0.002	polymerase chain reaction	0.003	sars	0.003
People	0.002	year	0.003	ct	0.003
Ace2	0.001	rt	0.002	inhibitors	0.003
Region	0.001	antiviral	0.002	covid 19 pandemic	0.002
Pneumonia	0.001	cov infection	0.002	clinical trials	0.002
Coronavirus	0.001	covid 19 pandemic	0.002	ace2	0.002
Protein	0.001	sars cov	0.002	cells	0.002
Recipient	0.001	receptor	0.002	specificity	0.002
Cytokine	0.001	angiotensin converting enzyme	0.002	distancing	0.002
Infection	0.001	therapeutic	0.002	report case	0.002
Protease	0.001	ground	0.002	healthcare	0.002
Coronavirus disease 2019	0.001	anti	0.002	therapeutic	0.002