Table 2.

ABO‐Rh blood group distribution among COVID‐19‐positive hospitalized patients (HC+), COVID‐19‐positive outpatients (C+), and the general population (C−)

	Cases (HC+)		Controls (C+)		General population (C−)
	Value	Percentage	Value	Percentage	Percentage
O+	144	35.6	124	33.7	38.4
O−	11	2.7	13	3.5	7.7
A+	161	39.9	165	44.8	32.3
A−	11	2.7	12	3.3	6.5
B+	45	11.1	30	8.2	9.4
B−	8	2.0	4	1.1	1.7
AB+	20	5.0	18	4.9	3.2
AB−	4	1.0	2	0.5	0.8
Total	404	100	368	100	100