ALB and type 2 diabetes mellitus: To obtain a prognostic model for occurrence of a lethal outcome in severe COVID-19 in patients with T2D, we used those risk factors which significantly differed between the groups of patients who died in the hospital and discharged patients, namely age, CCI, urea, glomerular filtration rate (GFR), aspartate aminotransferase (AST), albumin, CRP, creatine kinase (CK), procalcitonin, ferritin, glucose, neutrophils, thrombocytes, and D-dimers (Supplementary Materials Table S1).