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Risk of Admission to Hospital with Arterial or Venous Thromboembolism Among Patients Diagnosed in the Ambulatory Setting with COVID-19 Compared with Influenza: Retrospective Cohort Study

    Basic Details

    Studies evaluating thrombotic complications with COVID-19 have focused mainly on patients admitted to hospital. In this retrospective cohort study, we measured the 90-day risk of arterial thromboembolism and venous thromboembolism among patients diagnosed with COVID-19 in the ambulatory (i.e., outpatient, emergency department, or institutional) setting during periods before and during covid-19 vaccine availability and compared results to patients with ambulatory diagnosed influenza.


    Vincent Lo Re III, Sarah K Dutcher, Silvia Perez-Vilar, Dena M Carbonari, Terese A DeFor, Djeneba Audrey Djibo, Laura B Harrington, Laura Hou, Sean Hennessy, Rebecca A Hubbard, Maria E Kempner, Jennifer L Kuntz, Cheryl N McMahill-Walraven, Jolene Mosley, Pamala A Pawloski, Andrew B Petrone, Allyson M Pishko, Meighan Rogers Driscoll, Claudia A Steiner, Yunping Zhou, Noelle M Cocoros.

    Corresponding Author

    Dr. Vincent Lo Re III, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.