• Sara C Auld, Kristin R V Harrington, Max W Adelman, Chad J Robichaux, Elizabeth C Overton, Mark Caridi-Scheible, Craig M Coopersmith, David J Murphy, and Emory COVID-19 Quality and Clinical Research Collaborative.
• Emory Critical Care Center (ECCC), Atlanta, GA.
• Crit. Care Med. 2022 Feb 1; 50 (2): 245255245-255.

ObjectivesTo determine the association between time period of hospitalization and hospital mortality among critically ill adults with coronavirus disease 2019.DesignObservational cohort study from March 6, 2020, to January 31, 2021.SettingICUs at four hospitals within an academic health center network in Atlanta, GA.PatientsAdults greater than or equal to 18 years with coronavirus disease 2019 admitted to an ICU during the study period (i.e., Surge 1: March to April, Lull 1: May to June, Surge 2: July to August, Lull 2: September to November, Surge 3: December to January).Measurements And Main ResultsAmong 1,686 patients with coronavirus disease 2019 admitted to an ICU during the study period, all-cause hospital mortality was 29.7%. Mortality differed significantly over time: 28.7% in Surge 1, 21.3% in Lull 1, 25.2% in Surge 2, 30.2% in Lull 2, 34.7% in Surge 3 (p = 0.007). Mortality was significantly associated with 1) preexisting risk factors (older age, race, ethnicity, lower body mass index, higher Elixhauser Comorbidity Index, admission from a nursing home); 2) clinical status at ICU admission (higher Sequential Organ Failure Assessment score, higher d-dimer, higher C-reactive protein); and 3) ICU interventions (receipt of mechanical ventilation, vasopressors, renal replacement therapy, inhaled vasodilators). After adjusting for baseline and clinical variables, there was a significantly increased risk of mortality associated with admission during Lull 2 (relative risk, 1.37 [95% CI = 1.03-1.81]) and Surge 3 (relative risk, 1.35 [95% CI = 1.04-1.77]) as compared to Surge 1.ConclusionsDespite increased experience and evidence-based treatments, the risk of death for patients admitted to the ICU with coronavirus disease 2019 was highest during the fall and winter of 2020. Reasons for this increased mortality are not clear.Copyright © 2021 by the Society of Critical Care Medicine and Wolters Kluwer Health, Inc. All Rights Reserved.

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