COVID-19(93) SARS-CoV-2(49) Result(38) Patient(34) age(31) pandemic(30) Admission(26) Infection(22) reported(20) conducted(19) measure(19) coronavirus disease(18) COVID-19 pandemic(17) mortality rate(16) risk(16) respiratory(16) 95% CI(16) enrolled(15) Mortality(15) SARS-COV-2 infection(15) evaluate(14) outcome(14) proportion(14) help(14) survival(14) death(14) cross-sectional(13) Hospitalization(13) incidence(13) hospital(13)