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Objective: This study aimed to investigate the mortality relationship between COVID-19 and ABO blood groups and comorbid diseases. The aim of this study was to determine whether ABO blood groups and comorbid diseases can be used as a prognostic factor for hospitalization., Patients and Methods: This retrospective study included patients aged ≥ 18 years presenting to the adult emergency COVID-19 outpatient clinic. COVID-19 patients were divided into four stages according to their clinical status: mild, moderate, severe, and critical. Those with the comorbid disease were classified as Group I, and those without comorbid disease were classified as Group II., Results: Of the 384 patients included in the study, 190 (49.5%) were male and 194 (50.5%) were female, with a mean age of 47.3 ± 18.4 years. The clinical data of the patients were scanned from the hospital automation system. Although the risk of transmission was higher, especially in people with A blood type, this rate was lower in the O blood group. The clinical course of the disease was more severe and the mortality rates were higher in the AB blood group (p < 0.001). In the hospital, 35 people who were treated for COVID-19 disease died., Conclusions: Certain ABO blood types and comorbid diseases were important risk factors for COVID-19 and were associated with mortality. We found that some ABO blood groups and comorbid diseases are associated with COVID-19 and may be important risk factors. While the risk of transmission of COVID-19 is high in blood group A, we think that the clinical course of COVID-19 may be more severe and the death rate higher in blood group AB.

OBJECTIVE: This study aimed to investigate the mortality relationship between COVID-19 and ABO blood groups and comorbid diseases. The aim of this study was to determine whether ABO blood groups and comorbid diseases can be used as a prognostic factor for hospitalization. PATIENTS AND METHODS: This retrospective study included patients aged ≥ 18 years presenting to the adult emergency COVID-19 outpatient clinic. COVID-19 patients were divided into four stages according to their clinical status: mild, moderate, severe, and critical. Those with the comorbid disease were classified as Group I, and those without comorbid disease were classified as Group II. RESULTS: Of the 384 patients included in the study, 190 (49.5%) were male and 194 (50.5%) were female, with a mean age of 47.3 ± 18.4 years. The clinical data of the patients were scanned from the hospital automation system. Although the risk of transmission was higher, especially in people with A blood type, this rate was lower in the O blood group. The clinical course of the disease was more severe and the mortality rates were higher in the AB blood group (p < 0.001). In the hospital, 35 people who were treated for COVID-19 disease died. CONCLUSIONS: Certain ABO blood types and comorbid diseases were important risk factors for COVID-19 and were associated with mortality. We found that some ABO blood groups and comorbid diseases are associated with COVID-19 and may be important risk factors. While the risk of transmission of COVID-19 is high in blood group A, we think that the clinical course of COVID-19 may be more severe and the death rate higher in blood group AB. [ABSTRACT FROM AUTHOR]