Table 1 ABO blood group distributions in COVID-19 cases and controls
Phenotype | N (%) | OR | 95% CI | p | pc | |
|---|---|---|---|---|---|---|
Controls (N = 901) | Cases (N = 1014) | |||||
O | 331 (36.7) | 324 (32.0) | Reference | |||
A | 295 (32.7) | 360 (35.5) | 1.53 | 1.16–2.02 | 0.003 | 0.021 |
B | 194 (21.5) | 221(21.8) | 1.16 | 0.91–1.49 | 0.234 | 1.000 |
AB | 81 (9.0) | 109 (10.7) | 1.33 | 0.88–2.02 | 0.180 | 1.000 |
A + B | 489 (54.3) | 581 (57.3) | 1.21 | 1.00–1.47 | 0.053 | 0.371 |
A + AB | 376 (41.7) | 469 (46.3) | 1.48 | 1.14–1.93 | 0.003 | 0.021 |
B + AB | 275 (30.5) | 330 (32.5) | 1.46 | 1.10–1.94 | 0.080 | 0.480 |
A + B + AB | 570 (63.3) | 690 (68.0) | 1.50 | 1.17–1.82 | 0.001 | 0.007 |