Table 4.

The collected risk factors of meta-analyzed studies of statistical significance to help as a key for prediction of progression from a mild/moderate case of COVID-19 into severe/critical case.

Positive COVID-19 patient
Risk factors of prediction progression of cases from Mild/moderate to severe/critical
High-risk group
Risk factor
A-Age ≥ 66.9 (STD 15.4)
B-Any age with Comorbidity:	Risk degree for progression
1-Chronic obstructive lung disease	Four times
2-Hypertension	Twice
3-Diabetes	Twice and half