Relationship Between the ABO Blood Group and the Coronavirus Disease 2019 (COVID-19) Susceptibility.
Level 4 - case-series / case-control
Case-control study comparing COVID-19 patients to local control populations
PubMed 32750119 · doi:10.1093/cid/ciaa1150
What was done
Authors compared ABO blood group distributions in 2,173 COVID-19 patients against local control populations to explore the relationship between blood group and COVID-19 susceptibility.
What was found
Blood group A was associated with an increased risk of COVID-19 infection, whereas blood group O was associated with a decreased risk. The abstract reports no numerical values, effect sizes, odds ratios, or confidence intervals.
Why it matters
This study provides observational evidence linking ABO blood group phenotype to variation in SARS-CoV-2 infection susceptibility.
Limits
The abstract provides no quantitative data or risk estimates, does not specify the sample size or source of the control population, and does not report adjustments for potential demographic or clinical confounders.
Cited by
- supports A study investigating blood types and COVID-19 susceptibility found that blood group A is associated with a higher risk of infection, whereas blood group O is associated with a lower risk compared to non-O groups.