COVID mortality in US ICUs fell during first wave of pandemicTwenty-eight–day in-hospital mortality rates decreased from 29.9% to 19.7% for adult COVID-19 intensive care unit (ICU) patients over the first wave of the pandemic, according to an Annals of Internal Medicine study published yesterday.The study's retrospective cohort consisted of 468 critically ill coronavirus patients at five hospitals in the University of Pennsylvania Health System from Mar 1 to May 11, 2020, and rate changes over time were measured in 15-day blocks.Overall, the 28-day in-hospital all-cause mortality rate was 29.9%, and 10.8% of patients required hospital readmission for any reason within 30 days.