Are Patients With Diabetes Mellitus at Increased Risk of COVID-19 Infection

Background: The aim of this study was to examine the clinical course and outcomes of patients with diabetes mellitus (DM) with coronavirus disease-2019 (COVID-19). Methods: This retrospective, single-center study included 185 adult patients diagnosed with COVID-19. All patients were separated into 4 groups. Group 1(n=79): patients with no accompanying disease, Group 2 (n=14): patients with only DM, Group 3 (n=31): patients with comorbid disease(s) including DM, Group 4 (n=61): patients with comorbid disease(s) without DM. Data about COVID-19 management and outcome were obtained from the medical records of the patients. COVID-19 was confirmed by real-time polymerase chain reaction (RT-PCR) from throat swab samples. All patients underwent chest x-rays or chest computed tomography. Results: 185 patients diagnosed with COVID-19 were evaluated. The COVID-19 prognoses of the patients were classified as good, moderate and poor. No statistically significant difference was determined between the groups in terms of COVID-19 prognosis (p>0.05). While the rate of DM patients with a good prognosis was 20.4%, the DM patient rate increased up to 40% among moderate or poor prognosis patients. A statistically significant difference was observed between blood glucose levels and mortality (p: 0.008). Mortality due to COVID-19 pneumonia developed in 15 (8.1%) patients. Mortality increase was mostly encountered in the group with DM and accompanying comorbidities. It was observed that ACEI / ARB use had no effect on mortality. Conclusions: Although the study results do not show a statistically significant effect of DM on the prognosis of COVID-19 patients, the higher rate of DM patients in the group with poor prognosis suggests that it may affect the severity of COVID-19. These results may be useful for clinicians in the management of DM patients with COVID-19.