the effects of blood group types on the mortality and survival of patients with covid-19 infection

Background: identifying patient characteristics that may contribute to significant complications and mortality is essential. objectives: this study was conducted to evaluate the mortality and survival of patients with covid-19 by blood type. methods: this study was performed on 644 patients with covid-19 by a retrospective cohort method using recorded data of patients admitted to farabi and golestan-kermanshah hospitals. the data were extracted from patients' records through a researcher-made checklist. logistic regression and cox regression models were utilized in stata software version 14 to analyze the data. results: about 74.53% of patients were male, and the average age was 52.55 ± 16.9 years. the prevalence of blood groups was 22.67% (n = 146) o, 11.49% (n = 74) ab, 24.38% (n = 157) b, and 41.46% (n = 267) a, respectively. approximately 69.05% of patients were in the intensive care unit, 37.27% experienced intubations, and 18.94% died. the results showed that the chance of death in blood group ab, b, and a was 1.05 (p = 0.910) times, 2.09 (p = 0.022) times, and 2.29 (p = 0.005) times higher than in blood group o. in addition, the survival of patients with blood group a was lower than other blood groups (p = 0.001). conclusions: based on the results, blood groups o and b had a protective role against the death of covid-19. blood type o also required less intubation but was hospitalized longer.