Changes in imaging findings between baseline (pre- or during COVID-19 hospitalization) and follow-up (post-COVID-19 hospitalization).

Pre-covid was anytime prior to each patient’s individual COVID-19 infection, during COVID was during COVID-19 hospitalization, and post COVID-19 imaging was anytime after discharge and up to January 23, 2023. Only patients with both a baseline and follow-up scan were included. Imaging studies were scored as 0 (normal or no abnormality), 1 (mild abnormality), 2 (moderate abnormality), and 3 (severe abnormality). Mean ± SD or n (%). χ2 used to compare categorical variables and two-tailed t test use to compare continuous variables between groups.