Inclusion Criteria:  During the intensive care stay with SARS-CoV-2 infected intensive care patients of the Charité - Universitätsmedizin Berlin, admitted to the intensive care units of the Department of Anesthesiology and operative intensive care medicine (CCM / CVK) Treatment period: 01/01/2020 to 02/28/2021 At least 18 years old  Exclusion Criteria:  • Incomplete electronic documentation