Intronic Variants of the Angiotensin-Converting Enzyme 2 Gene Modulate Plasma ACE2 Levels and Possibly Confer Protection against Severe COVID-19

Table 1

Demographic and biochemical data of all patients of the study.

Parameter	Reference range	All patients; ()	Stratified to severity			value	Stratified to gender		value
			Severe; ()	Moderate; ()	Mild; ()		Male; ()	Female; ()
Age; (years)	—					0.09			0.29
Ferritin; (ng/mL)	20-336					0.49			0.61
D-dimer; (g/mL)	<0.5					0.06			0.49
CRP; (mg/L)	<6					1.58 10^-5			0.03
O2 level (%)	>95					0.005			0.62