ABSTRACT
The aim of this study is to evaluate the effect of blood groups (BGs) on Covid-19 contraction and prognosis and to reveal the coefficients. Patients who referred to Covid-19 outpatient clinics and had an established diagnosis of Covid-19 were included in the study. Their BGs, previous diagnoses and blood examination findings were retrospectively analyzed. Duration of hospitalization, clinical course and survival were recorded. The mean age of 365 subjects, 210 female and 155 male, was 45,5 years. Subjects with BG A developed Covid-19 at significantly higher rates (p = 0.001), while BG O was found associated with lower rates (p = 0.005). Lymphocyte count was found lower (p = 0.035) and rate of lung parenchymal involvement was higher (p = 0.003) in patients with Rh antigen. It was found that a higher percentage of patients with B BG required treatment in the intensive care unit (ICU) compared to other ABO BGs (p = 0.015). These results suggest a higher risk of Covid-19 contraction in the population with BG A and lower risk for BG O population while indicating poorer prognosis for patients with BG B. Copyright © 2022 Ondokuz Mayis Universitesi. All rights reserved.