Clin Infect Dis. 2021 Sep 17:ciab830. doi: 10.1093/cid/ciab830. Online ahead of print.
After an initial decline from April through June 2020 (from 22.2% to 11.9%), adjusted in-hospital mortality in COVID-19 inpatients peaked twice and was significantly higher than June 2020 for subsequent months except in July and October 2020. Adjusted mortality trends differed across age groups between November 2020 and February 2021.