Understanding Drivers of Coronavirus Disease 2019 (COVID-19) Racial Disparities: A Population-Level Analysis of COVID-19 Testing Among Black and White Populations

Author:

Mody Aaloke1ORCID,Pfeifauf Kristin1,Bradley Cory1,Fox Branson1,Hlatshwayo Matifadza G1,Ross Will1,Sanders-Thompson Vetta2,Joynt Maddox Karen1,Reidhead Mat3,Schootman Mario4,Powderly William G1,Geng Elvin H1

Affiliation:

1. Washington University School of Medicine, St Louis, Missouri, USA

2. Brown School of Social Work, Washington University in St Louis, St Louis, Missouri, USA

3. Hospital Industry Data Institute, Missouri Hospital Association, St Louis, Missouri, USA

4. SSM Health, St Louis, Missouri, USA

Abstract

Abstract Background Disparities in coronavirus disease 2019 (COVID-19) testing—the pandemic’s most critical but limited resource—may be an important but modifiable driver of COVID-19 inequities. Methods We analyzed data from the Missouri State Department of Health and Senior Services on all COVID-19 tests conducted in the St Louis and Kansas City regions. We adapted a well-established tool for measuring inequity—the Lorenz curve—to compare COVID-19 testing rates per diagnosed case among Black and White populations. Results Between 14/3/2020 and 15/9/2020, 606 725 and 328 204 COVID-19 tests were conducted in the St Louis and Kansas City regions, respectively. Over time, Black individuals consistently had approximately half the rate of testing per case than White individuals. In the early period (14/3/2020 to 15/6/2020), zip codes in the lowest quartile of testing rates accounted for only 12.1% and 8.8% of all tests in the St Louis and Kansas City regions, respectively, even though they accounted for 25% of all cases in each region. These zip codes had higher proportions of residents who were Black, without insurance, and with lower median incomes. These disparities were reduced but still persisted during later phases of the pandemic (16/6/2020 to 15/9/2020). Last, even within the same zip code, Black residents had lower rates of tests per case than White residents. Conclusions Black populations had consistently lower COVID-19 testing rates per diagnosed case than White populations in 2 Missouri regions. Public health strategies should proactively focus on addressing equity gaps in COVID-19 testing to improve equity of the overall response.

Funder

National Center for Advancing Translational Sciences

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Microbiology (medical)

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