Patient(15) COVID-19(15) Result(12) Mortality(8) supplementary material(8) outcome(7) Admission(7) COVID-19 patient(7) ICU(7) patients with COVID-19(6) intensive care(6) Analysis(6) Coronavirus disease 2019(5) coronavirus disease(5) reported(5) 95% CI(5) performed(4) Meta-analysis(4) information(4) severity(4) Invasive mechanical ventilation(4) SARS-CoV-2(4) sensitivity(3) severe COVID-19(3) mechanical ventilation(3) Ventilator-associated pneumonia(3) database(3) clinical(3) death(3) evaluated(3)