COVID-19(20) Patient(14) COVID‐19(14) patients(9) Admission(9) Pneumonia(9) significantly higher(9) death(8) patients with COVID-19(8) age(8) eligible(7) coronavirus(7) pneumonia.(7) Effectiveness(6) COVID-19 patient(6) patient data(6) group(6) Hospitalized(6) coronavirus disease(6) collected(6) moderate(6) severity(5) discharge(5) Hospitalization(5) management(5) was used(5) with COVID-19(5) Coronavirus disease 2019(5) acute respiratory syndrome(5) effective(5)