COVID-19(17) Diagnosis(9) receiving(8) Hospitalized(8) hospital(8) Cohort(8) stratified(8) participant(8) retrospective(8) Patient(8) age(7) coronavirus(7) aging(7) respiratory(6) baseline(6) glomerular filtration rate(6) Prognosis(6) filtration rate(6) individual(6) coronavirus 2(6) Food and Drug Administration(6) Drug administration(6) variable(6) clinical(6) evaluated(6) EGFR(6) reduce(6) recovered(6) internal medicine(6) estimated glomerular filtration rate(6)