Fig. 2.

Data workflow. Registry created from individuals with at least one SARS-CoV-2 positive PCR test at any of our 18 care sites across the Mid-South between March 1 and June 5, 2020. COVID-19 case definition validated on a subset of EHRs dated after billing guidelines issued April 1. Random sampling of adult inpatient and outpatient EHRs selected for phenotyping. Double arrows indicate comparison between cohorts. Dotted lines indicate processes that contributed to decision making in the methods workflow (solid lines). COVID-19: coronavirus disease 2019; PCR: polymerase chain reaction; ICD-10: International classification of diseases, Tenth revision, Clinical modification; EHR: electronic health record; ICU: intensive care unit; COPD: chronic obstructive pulmonary disease; CHF: congestive heart failure; DVT/PE: deep venous thrombosis/pulmonary embolism.