Table 1.

Demographic and clinical characteristics of COVID-19 infection included in the reviewed studies

Characteristics	N (%)
Diagnostic approach ( n = 8,219)
Only clinical signs and CT Scan	4,180 (50.9)
PCR laboratory confirmed	4,039 (49.1)
Sex ( n = 6,308)
Male	2,822 (44.7)
Female	3,486 (55.3)
Comorbidity with COVID-19 ( n = 1, 532)
Hypertension	593 (38.7)
Diabetes	294 (19.2)
Respiratory system disease	219 (14.3)
Cardiovascular and cerebrovascular diseases	188 (12.3)
Cancer	60 (3.9)
Disease of immune system	59 (3.9)
Hepatitis	54 (3.5)
Liver disease	33 (2.1)
Kidney disease	32 (2.1)