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. 2020 Nov 20;7:585341. doi: 10.3389/fmed.2020.585341

Table 3.

The unadjusted association between the stratified outcome of COVID-19 and various variables including age, sex, and ABO blood groups.

Severity of the disease χ2 P-value
Mild Moderate Severe/Critical
Blood group A 36.1% 42.6% 50% 1.464 0.493
B 23.6% 11.1% 10% 3.844 0.149
O 30.6% 42.6% 35% 1.966 0.386
AB 9.7% 3.7% 5% 1.638 0.446
Total 100% 100% 100%
Sex Female 34.7% 35.2% 25% 0.714 0.717
Male 65.3% 64.8% 75%
Total 100% 100% 100%
Age group ≤ 21 19.4% 0% 0% 16.146 0.000
22-40 65.3% 29.6% 15% 24.681 0.000
41-59 12.5% 46.3% 30% 17.935 0.000
≥60 2.8% 24.1% 55% 3.544 0.000
Total 100% 100% 100%