Patients
In this retrospective study, 1320 patients hospitalized at the Aksaray University Training and Research Hospital between July 2020 and December 2020 were evaluated. Recommended criteria established by the Scientific Committee of the Ministry of Health were used in the selection of definite COVID-19 patients (6). The diagnosis of COVID-19 was made according to the guidelines of Ministry of Health of Turkey and confirmed by real time polymerase chain reactions (RT-PCR) performed on respiratory samples of the patient(6). All of the cases included in the study were patients with moderate and severe symptoms and in need of hospitalization. Patients who had acute respiratory tract infection in the last 14 days were hospitalized and followed up in case of severe infection, fever, cough, dyspnea, tachypnea, hypoxemia, hypotension, diffuse radiological findings on lung imaging or change in consciousness (6). Patients who had missing hematological results, transfers to other medical facilities with uncertain outcomes, and patients under 18 years of age were excluded from the study.