Excess Mortality Among Patients Hospitalized During the COVID-19 Pandemic.

Abstract

BACKGROUND\nThe extent to which the COVID-19 pandemic has affected outcomes for patients with unplanned hospitalizations is unclear.\n\n\nOBJECTIVE\nTo examine changes in in-hospital mortality for patients without COVID-19 during the first 10 months of the pandemic (March 4, 2020 to December 31, 2020).\n\n\nDESIGN, SETTING, AND PARTICIPANTS\nObservational study of adults with unplanned hospitalizations at 51 hospitals across 6 Western states.\n\n\nEXPOSURES\nUnplanned hospitalizations occurring during the spring COVID-19 surge (March 4 to May 13, 2020; Period 1), an intervening period (May 14 to October 19, 2020; Period 2), and the fall COVID-19 surge (October 20 to December 31, 2020; Period 3) were compared with a pre-COVID-19 baseline period from January 1, 2019, to March 3, 2020.\n\n\nMAIN OUTCOMES AND MEASURES\nWe examined daily hospital admissions and in-hospital mortality overall and in 30 conditions.\n\n\nRESULTS\nUnplanned hospitalizations declined steeply during Periods 1 and 3 (by 47.5% and 25% compared with baseline, respectively). Although volumes declined, adjusted in-hospital mortality rose from 2.9% in the pre-pandemic period to 3.5% in Period 1 (20.7% relative increase), returning to baseline in Period 2, and rose again to 3.4% in Period 3. Elevated mortality was seen for nearly all conditions studied during the pandemic surge periods.\n\n\nCONCLUSION\nPandemic COVID-19 surges were associated with higher rates of in-hospital mortality among patients without COVID-19, suggesting disruptions in care patterns for patients with many common acute and chronic illnesses.