ALB and COVID-19: With only 10 predictors, the final parsimonious model (N10) still predicts COVID-19 adverse outcomes accurately and similarly to the full model (Table 2); for instance, the final parsimonious model consisting of age, systolic and diastolic blood pressures, respiration rate, pulse, temperature, BUN, SpO2, albumin, and presence of any major cognitive disorder (including dementia, Parkinson disease, and Alzheimer disease) as input predicts all-cause mortality accurately with AUC of 0.88 (95% CI 0.87-0.88).