Table 1.
Comparison of the ABO blood group distribution between 187 patients with COVID-19 pneumonia and the control group.
| COVID-19 | Control group | χ2 | P | |
|---|---|---|---|---|
| Subjects, n | 187 | 1991 | ||
| Blood group, n | ||||
| A | 69(36.90) | 547(27.47) | 7.486 | 0.006* |
| B | 63(33.69) | 644(32.35) | 0.141 | 0.707 |
| O | 41(21.92) | 601(30.19) | 5.611 | 0.018* |
| AB | 14(7.49) | 199(9.99) | 1.219 | 0.270 |
| Blood group, OR (95% CI) | ||||
| A—B | 1.289(0.904–1.848) | — | 1.923 | 0.166 |
| A—O | 1.849(1.228–2.768) | — | 9.134 | 0.003* |
| A—AB | 1.793(0.992–3.308) | — | 3.763 | 0.052 |
| B—O | 1.434(0.959–2.166) | — | 3.014 | 0.083 |
| B—AB | 1.391(0.762–2.552) | — | 1.167 | 0.280 |
| O—AB | 0.970(0.513–1.761) | — | 0.009 | 0.923 |
| A—Non-A | 1.544(1.122–2.104) | — | 7.486 | 0.006* |
| B—Non-B | 1.063(0.773–1.457) | — | 0.141 | 0.707 |
| O—Non-O | 0.649(0.457–0.927) | — | 5.611 | 0.018* |
| AB—Non-AB | 0.729(0.409–1.251) | — | 1.219 | 0.270 |
Data are n (%) unless specified otherwise. COVID-19 = Coronavirus disease 2019.
*
Means the result have statistically significance.