Method 
After the patients were hospitalized in Siirt State Hospital, about 30 ml of clean mid-flow urine samples were taken from the patients on the same day. A urine sample was taken from critical COVID-19 patients by inserting a catheter. Biochemical parameters of urine such as urine occult blood, urine glucose, nitrite, SG, pH proteinuria, and leukocytes were tested using a fully automatic urine biochemical analyzer (DIRUI FUS 200 / H -800, DIRUI IndustrialCo., China). All collected samples were studied within 2 hours.