Fig 1.
Flowchart of diagnosed COVID-19 cases: The Optum EHR COVID-19 database January-November 2020.
*Patients who received critical care mechanical ventilation were counted in both categories.
Fig 2.
Fig 3.
Table 1.
Demographics and comorbidities among hospitalized patients with COVID-19a.
Table 2.
Characterization of patients hospitalized with COVID-19 during hospitalization overall* and by admission month in 2020.