COVID-19(17) Diagnosis(9) retrospective(8) Patient(8) receiving(8) Hospitalized(8) hospital(8) Cohort(8) stratified(8) participant(8) coronavirus(7) aging(7) age(7) hospitalized patient(6) Admission(6) Chronic kidney disease(6) acute respiratory syndrome(6) observational study(6) inclusion criteria(6) glomerular filtration(6) Severe acute respiratory syndrome(6) inflammatory cascade(6) respiratory(6) baseline(6) glomerular filtration rate(6) Prognosis(6) filtration rate(6) coronavirus 2(6) individual(6) Drug administration(6)