COVID-19(16) Patient(9) hospital(7) ICU(7) coronavirus disease(7) pandemic(6) outcome(5) intensive care(5) median(5) Result(5) mechanical ventilation(5) interquartile range(5) patients with COVID-19(4) groups(4) SARS-CoV-2(4) eligible(4) reported(4) patients(4) therapy(4) questionnaire(4) Safe(4) Nursing(4) assessment(4) objective(4) evaluated(4) COVID-19 pandemic(4) conducted(4) survival(3) Critical care(3) ARDS(3)