Letter to the Editor: Premorbid Frailty is a Better Prognostic Indicator Than Age in Oldest-Old Hospitalized With COVID-19

Older people have a higher susceptibility for coronavirus disease 2019 (COVID-19) and a higher risk of developing severe COVID-19 symptoms and mortality.1 Current studies examining the relation between outcome and frailty in COVID-19 show contrasting results2–7; however, these studies did not include illness severity as an effect. We conducted a multicenter cohort study in patients aged 80 years and older who were admitted with COVID-19 to 10 different acute hospitals in March and April 2020 in order to better understand the relation between frailty and in-hospital mortality combined with respiratory failure.