Numerous clinical factors are now recognized as risk factors for COVID-19 mortality.1,2 Concurrently, demographic patterns suggest that fatalities are disproportionately high in non-Hispanic Black and Hispanic (BH) communities in the United States (US).3,4,5 We hypothesized that disparities in social & economic status (SES) and physical environment (PE), with their resultant inequities, may be contributing to the high fatalities. These factors have been known to contribute to the upstream determinants of many clinical outcomes in non-COVID-19 circumstances. Therefore, we performed a rapid analysis of the ten counties with the most COVID-19 deaths with their SES and PE rankings, population size and racial composition to test this proposition.6
We examined a total of ten US counties with the highest COVID-19 fatalities (as of January 1, 2021) from the Johns Hopkins University Coronavirus resource centre.4 County-level population size, racial demographics, SES and PE factors from the publicly available Robert Wood Johnson Foundation (RWJF) County Health Rankings5 were compared to fatality case numbers.
Among the counties with high fatalities, Cook (IL), Harris (TX), Wayne (MI), Miami-Dade (FL), Bronx (NYS), Maricopa (CA), Kings (NY) and Los Angeles (CA) have the poorest SES or PE rankings in their respective states (Figure 1). All counties except one (Queens) are among the worst counties based on SES and PE ranking in their respective states (SES and PE scores >50). Between 44-86% of the populations in these counties are BH. Additionally, among all counties examined, these have the highest population size (Figure 2). Los Angeles, the county with the most deaths in the US, has both a high BH population percentage (57%) and the largest population (> 10 million) among all counties examined. While Queens and NY (Manhattan) have mid-range SES and PE scores (QU 37; 39 & NY 50; 52, respectively) they have some of the highest population sizes in New York State.
Figure 1: Social & Economic (SE) and Physical Environment Scores (PES) in Ten Counties with the Largest Numbers of COVID-19 Fatalities*
* All data is current as of January 1, 2021. In order to standardize county-level rankings between different states, their SES and PE scores were scaled from 0-100 (higher numbers indicating worse scores). The RWJF rankings use county-level measures from a variety of national and state data sources (such as US census bureau, state education department, etc.) and combines them with scientifically-informed weights.6 Some metrics that contribute to the SES rankings include education level (high school/college), unemployment status, presence of income inequality, single parent households and social associations. The PE score is derived from factors such as air pollution, housing problems, long commute times and more. A score of >50 suggests a county’s SES or PE is among the worst performing (bottom half in ranking) counties in the state for those factors; a score of 100 indicates the county is the worst ranking county in the state for SES or PE.
Figure 2: Total Number of COVID-19 Deaths/County against the Proportion of non-Hispanic Black and Hispanic Populations and the County Population in Ten US counties with the Largest Number of COVID-19 Deaths†
† Proportion of non-Hispanic Black and Hispanic Population in percentage of total county population. Size of bubble is proportionate to population size in the county.
1. Grasselli G, Zangrillo A, Zanella A, et al. Baseline Characteristics and Outcomes of 1591 Patients Infected With SARS-CoV-2 Admitted to ICUs of the Lombardy Region, Italy. JAMA : the journal of the American Medical Association 2020 doi: 10.1001/jama.2020.5394 [published Online First: 2020/04/07]
2. Richardson S, Hirsch JS, Narasimhan M, et al. Presenting Characteristics, Comorbidities, and Outcomes Among 5700 Patients Hospitalized With COVID-19 in the New York City Area. JAMA : the journal of the American Medical Association 2020 doi: 10.1001/jama.2020.6775 [published Online First: 2020/04/23]
3. Health NYSDo. NYS COVID19 tracker 2020 [cited 2020 April 19, 2020]. Available from: https://covid19tracker.health.ny.gov/views/NYS-COVID19-Tracker/NYSDOHCOVID-19Tracker-Fatalities?%3Aembed=yes&%3Atoolbar=no&%3Atabs=n accessed April 19 2020.
4. University JH. JHU Coronavirus US map 2020 [Available from: https://coronavirus.jhu.edu/us-map accessed April 19 2020.
5. Yancy CW. COVID-19 and African Americans. JAMA : the journal of the American Medical Association 2020 doi: 10.1001/jama.2020.6548 [published Online First: 2020/04/16]
6. Foundation RWJ. United States County Health Rankings 2020 [cited 2020 April 19, 2020]. Available from: https://www.countyhealthrankings.org accessed April 19 2020.