COVID-19(19) Result(12) hospital(11) Patient(10) pandemic(10) surgical(7) COVID-19 pandemic(7) positive(6) Cohort(5) with COVID-19(5) collected(5) SARS-CoV-2(5) identify(5) Prognostic marker(4) Treatment(4) clinics(4) outcome(4) Evidence(4) quarantine(3) delirium(3) lactate dehydrogenase(3) Competencies(3) Nosocomial transmission(3) impacted(3) mortality rates(3) Hospital stay(3) presenting symptoms(3) Older adults(3) statistical significance(3) cumulative(3)