Metformin significantly lowers the mortality rate in diabetic COVID-19 patients
Abstract Introduction: This study evaluates the effect of glycemic control and anti-diabetic agents on the prognosis of diabetic COVID-19 patients. Method: The study includes diabetic patients who were treated and followed up in our hospital because of COVID-19 between 1 June 2020 and 1 January 2021. Patients with any additional comorbidity were excluded from the study. The demographic data of the patients, physical examination findings, laboratory tests, and radiological examination results were obtained retrospectively from the hospital records system.Results: A total of 207 diabetic patients consisted of 125 (60.4%) males and 82 (39.6%) females were included to this study. The mortality rate in cases using metformin was found to be statistically significantly lower than in cases using other drugs (p=0.016; p<0.05). No statistically significant difference was found between the HbA1c and glucose measurements of the cases according to mortality (p>0.05).Discussion: Metformin treatment in diabetic patients diagnosed with COVID-19 should not be stopped, other than in cases with severely hypoxic advanced stage chronic renal failure. Metformin can be recommended as a preventative drug to increase survival in diabetic patients with COVID-19. Nevertheless, there is a need for more evidence and more extensive studies to investigate the protective effects of metformin in COVID-19 patients and in similar viral infections.