Zhao (2020)
Relationship between the ABO Blood Group and the COVID-19 Susceptibility
https://doi.org/10.1101/2020.03.11.20031096
https://www.medrxiv.org/content/10.1101/2020.03.11.20031096v2
Patient characteristics
ABO blood group (0 blood group vs. Persons with other than 0 blood group)
COVID-19 (any condition)
Odds ratio: 0.680 (0.600-0.770) Adjusted model. Calculated odds ratio based on data reported in the article.

China

Descriptive (Case report/series)

Medical records

1775

Patients infected with SARS-CoV-2 in Wuhan Jinyintan Hospital. Controls (Wuhan Area) N=3694

none

0


COVID-19 (any condition)

1775

none


Patient characteristics

ABO blood group

none

Persons with other than 0 blood group

1317

3761

0 blood group

458

1708


Odds ratio

0.680 (0.600-0.770)

Yes

No

Yes

random effects model


none

Average

Yes