Table 1 Frequency of ABO and Rh blood groups in control and COVID-19 patient groups

 O

377 (36.39)

98 (32.56)

1.0

–

–

1.0

–

–

 A

330 (31.85)

112 (37.21)

1.30

0.95–1.77

0.090

1.31

0.96–1.79

0.086

 B

243 (23.46)

61 (20.26)

0.96

0.67–1.38

0.848

0.97

0.68–1.40

0.910

 AB

86 (8.30)

30 (9.97)

1.34

0.83–2.15

0.221

1.36

0.84–2.19

0.204

 A + AB

416 (40.15)

142 (47.18)

1.31

0.98–1.76

0.068

1.32

0.95–1.77

0.063

 Rh⁺

955 (92.18)

245 (81.40)

1.0

–

–

1.0

–

–

 Rh⁻

81 (7.82)

56 (18.60)

2.97

1.86–3.89

< 0.001

2.69

1.85–3.91

< 0.001

Total

1036 (100.0)

301 (100.0)