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Research Article 2023-03-18CC0Free full text

Demographic and co-morbidity characteristics of patients tested for SARS-CoV-2 from March 2020 to January 2022 in a national clinical research network: results from PCORnet(R)

Jason P. Block, Keith A. Marsolo, Kshema Nagavedu, L. Charles Bailey, Tegan K. Boehmer, Julia Fearrington +13 more

BackgroundPrior studies have documented differences in the age, racial, and ethnic characteristics among patients with SARS-CoV-2 infection. However, little is known about how these characteristics changed over time during the pandemic and whether racial, ethnic, and age disparities evident early in the pandemic were persistent over time. This study reports on trends in SARS-CoV-2 infections among U.S. adults from…

medRxiv medRxiv

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Research Article 2023-02-23CC BYFree full text

Excess burden of respiratory and abdominal conditions following COVID-19 infections during the ancestral and Delta variant periods in the United States: An EHR-based cohort study from the RECOVER Program

Jay K. Varma, Chengxi Zang, Thomas W. Carton, Jason P. Block, Dhruv J. Khullar, Yongkang Zhang +13 more

ImportanceThe frequency and characteristics of post-acute sequelae of SARS-CoV-2 infection (PASC) may vary by SARS-CoV-2 variant. ObjectiveTo characterize PASC-related conditions among individuals likely infected by the ancestral strain in 2020 and individuals likely infected by the Delta variant in 2021. DesignRetrospective cohort study of electronic medical record data for approximately 27 million patients from…

medRxiv medRxiv

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