Objective: COVID-19 continues to pose a public health threat globally. This study evaluated the risk factors of hospitalized patients associated with hospital mortality for COVID-19 and symptoms on days 14, 28, and 6th-month. Methods: The study included 133 adults hospitalized due to COVID-19 between April 1, 2020 and June 30, 2020. Patient files were retrospectively reviewed. The demographic characteristics of the patients were evaluated by dividing them into two groups according to the clinical severity of COVID-19. (group 1: mild+moderate, group 2: severe+critical). Risk factors associated with mortality were revealed. Symptoms on day 14 and day 28 were questioned in person or by phone if patients were discharged and symptoms at 6 months were questioned by phone. Results: Comparison of laboratory findings between the groups showed that patients in group 2 had lower serum lymphocyte count and higher levels of C-reactive protein, ferritin, D-dimer, procalcitonin, and troponin T at admission and during follow-up (p