key: cord-336004-oz5feg0r
authors: Bui, David P.; McCaffrey, Keegan; Friedrichs, Michael; LaCross, Nathan; Lewis, Nathaniel M.; Sage, Kylie; Barbeau, Bree; Vilven, Dede; Rose, Carolyn; Braby, Sara; Willardson, Sarah; Carter, Amy; Smoot, Christopher; Winquist, Andrea; Dunn, Angela
title: Racial and Ethnic Disparities Among COVID-19 Cases in Workplace Outbreaks by Industry Sector — Utah, March 6–June 5, 2020
date: 2020-08-21
journal: MMWR Morb Mortal Wkly Rep
DOI: 10.15585/mmwr.mm6933e3
sha: 
doc_id: 336004
cord_uid: oz5feg0r

Improved understanding of the overall distribution of workplace coronavirus disease 2019 (COVID-19) outbreaks by industry sector could help direct targeted public health action; however, this has not been described. The Utah Department of Health (UDOH) analyzed COVID-19 surveillance data to describe workplace outbreaks by industry sectors. In this report, workplaces refer to non-health care, noncongregate-living, and noneducational settings. As of June 5, 2020, UDOH reported 277 COVID-19 outbreaks, 210 (76%) of which occurred in workplaces. Approximately 12% (1,389 of 11,448) of confirmed COVID-19 cases in Utah were associated with workplace outbreaks. The 210 workplace outbreaks occurred in 15 of 20 industry sectors;* nearly one half of all workplace outbreaks occurred in three sectors: Manufacturing (43; 20%), Construction (32; 15%) and Wholesale Trade (29; 14%); 58% (806 of 1,389) of workplace outbreak-associated cases occurred in these three sectors. Although 24% of Utah's workforce in all 15 affected sectors identified as Hispanic or Latino (Hispanic) or a race other than non-Hispanic white (nonwhite†) (1), 73% (970 of 1,335) of workplace outbreak-associated COVID-19 cases were in persons who identified as Hispanic or nonwhite. Systemic social inequities have resulted in the overrepresentation of Hispanic and nonwhite workers in frontline occupations where exposure to SARS-CoV-2, the virus that causes COVID-19, might be higher (2); extra vigilance in these sectors is needed to ensure prevention and mitigation strategies are applied equitably and effectively to workers of racial and ethnic groups disproportionately affected by COVID-19. Health departments can adapt workplace guidance to each industry sector affected by COVID-19 to account for different production processes and working conditions.

workers of racial and ethnic groups disproportionately affected by COVID-19. Health departments can adapt workplace guidance to each industry sector affected by COVID-19 to account for different production processes and working conditions. Data on workplace COVID-19 outbreaks occurring during March 6-June 5, 2020, were collected from UDOH's COVID-19 case surveillance system. UDOH defined workplace outbreaks as the occurrence of two or more laboratoryconfirmed COVID-19 cases occurring within the same 14-day period among coworkers in a common workplace (i.e., same facility). UDOH classifies outbreaks in congregate living facilities, educational institutions, and health care facilities as distinct outbreak types that are managed differently from general workplace outbreaks because of the special populations they serve and the setting-specific guidance they require. Thus, cases from these settings were not included in this analysis of workplace outbreaks. Case investigators collected facility addresses, business names, or both for all workplace outbreaks. Workplaces were classified according to the North American Industry Classification System (NAICS; https://www.census. gov/eos/www/naics/) into one of 20 industry sectors. NAICS codes for workplaces were obtained from Utah's Division of Corporations and Commercial Code directory of registered businesses (https://secure.utah.gov/bes/). Because of small case numbers and similarities in sector processes and settings, the sectors for Professional, Scientific, and Technical services and Information were combined into a single category, as were the Finance and Insurance, Real Estate and Rental and Leasing, and Public Administration sectors.

The distribution of workplace outbreaks and associated cases across sectors was described. Outbreak incidence (cases per 100,000 workers) was calculated using Utah sector workforce estimates reported in the 2019 Census Quarterly Workforce Indicators (1) for sector denominators; workforce estimates were not adjusted to remove workers affected by outbreaks in excluded settings (e.g., educational workers and health care workers). Descriptive statistics and chi-squared tests were used to summarize and compare demographics and outcomes (e.g., hospitalization) of persons with workplace outbreak-associated COVID-19 with persons of working age (≥15 years) with nonoutbreak-associated COVID-19 (i.e., cases not associated with an outbreak). To identify sectors in which COVID-19 racial and ethnic disparities might be unrecognized, the racial and ethnic composition of workplace outbreak-associated cases were compared with the overall racial and ethnic composition in each sector in Utah. All statistical analyses were done in R (version 3.6.1; The R Foundation); p-values <0.05 were considered statistically significant.

During March 6-June 5, 2020, UDOH reported 11,448 confirmed COVID-19 cases throughout Utah, including 1,389 (12%) associated with workplace outbreaks, 1,081 (9%) associated with outbreaks in other settings (i.e., congregate living, educational, health care), and 8,978 (78%) that were not associated with an outbreak. UDOH reported 210 workplace COVID-19 outbreaks (median cases per workplace outbreak = 4; range = 2-79) involving 15 industry sectors, most frequently in Manufacturing (43; 20%), Construction (32; 15%), and Wholesale Trade (29; 14%); these three sectors accounted for 58% (806 of 1,389) of workplace outbreak-associated cases ( Table 1 ). The incidence among workplace outbreak-associated cases was highest in the Wholesale Trade (377 per 100,000 workers) and Manufacturing (339 per 100,000 workers) sectors.

Compared with persons aged ≥15 years with nonoutbreakassociated COVID-19 (median age = 38 years), persons with workplace outbreak-associated COVID-19 were older (median age = 41 years) (Mann-Whitney test, p = 0.01), more likely to identify as Hispanic (56.4% versus 39.8%; p <0.001), and more likely to be male (61.4% versus 50.6%; p <0.001) ( Table 2 ). The proportion of patients hospitalized was significantly lower among persons with workplace outbreak-associated COVID-19 (6.1%) than among those with nonoutbreak-associated COVID-19 (7.6%) (p = 0.01).

Among persons with workplace outbreak-associated COVID-19, information on race and ethnicity was available for 1,335 (96%); 783 (59%) workers with workplace outbreakassociated COVID-19 identified as Hispanic, 365 (27%) as non-Hispanic white, and 187 (19%) as nonwhite. In total, 970 (73%) of persons with workplace outbreak-associated COVID-19 identified as Hispanic or nonwhite, although these ethnic/racial groups represent <24% of Utah's workforce in the 15 affected industry sectors (1). This disparity was observed across all 15 industry sectors with the largest in Wholesale Trade (percentage point difference between percentage of Hispanic or nonwhite workers among workplace outbreak-associated COVID-19 cases and the overall workforce = 58) and Manufacturing (percentage point difference = 53) sectors ( Figure) .

During March 6-June 5, COVID-19 outbreaks were identified in nearly all assessed industry sectors in Utah, with approximately one half of workplace outbreak-associated cases occurring in three sectors: Manufacturing, Construction, and Wholesale Trade. Persons with workplace outbreak-associated COVID-19 were disproportionately Hispanic or nonwhite compared with overall racial/ethnic distributions in these industry sectors. Sector-specific COVID-19 guidance, which CDC has generated for many industries, §, ¶, ** should be followed to account for different production processes, business operations, and working conditions faced by workers in these sectors. When available, efforts should be made to help employers operationalize sector-specific guidance; CDC and UDOH plain-language business guides can help employers manage and prevent workplace outbreaks and exposures. † † Avoiding introduction of SARS-CoV-2 into workplaces is critical to preventing outbreaks, making both community-and workplace-specific interventions important if SARS-CoV-2 transmission in workplace settings is to be prevented. Health departments and employers need to ensure mitigation strategies are provided using culturally and linguistically responsive materials and messages, which reach workers of racial and ethnic minority groups, especially those disproportionately affected by workplace COVID-19 outbreaks.

The racial and ethnic disparities in workplace outbreak-associated COVID-19 cases found in Utah and identified in meat processing facility outbreaks in other states (3) demonstrate a disproportionate risk for COVID-19. These disparities might be driven, in part, by longstanding health and social inequities (2) , resulting in the overrepresentation of Hispanic and nonwhite workers in frontline occupations (i.e., essential and direct-service) where risk for SARS-CoV-2 exposure might be higher than that associated with remote or nondirect-service work (4). In addition, Hispanic and nonwhite workers have less flexible work schedules and fewer telework options compared with white and non-Hispanic workers (5). Lack of job flexibility (i.e., ability to vary when to start and end work), lack of telework options, and unpaid or punitive sick leave policies might prevent workers from staying home and seeking care when ill, resulting in more workplace exposures, delayed treatment, and more severe COVID-19 outcomes (6, 7) . Whenever employers can provide flexible work schedules, nonpunitive paid sick leave, and telework options, they should offer this equitably to Hispanic and nonwhite workers.

The findings in this report are subject to at least six limitations. First, this analysis is not representative of all workplace outbreaks in Utah. workers not part of a workplace outbreak. § Among cases with known race and ethnicity (n = 1,335); Hispanic includes Hispanic or Latino; nonwhite includes the following (all non-Hispanic): black or African American, American Indian or Alaska Native, Asian, Native Hawaiian or Other Pacific Islander, two or more races, or other race groups. ¶ Among cases with known hospitalization (n = 1,382) or severity status (n = 1,155); severe outcome defined as intensive care unit admission, mechanical ventilation, or death. ** Because of small case numbers, Information (NAICS code 51) and Professional, Scientific, and Technical services (NAICS code 54) sectors were combined into a single category; Finance and Insurance (NAICS code 52), Real Estate and Rental and Leasing (NAICS code 53), and Public Administration (NAICS code 92) sectors were also combined into a single category. † † The full name of this NAICS sector includes "Health Care"; however, because health care settings were not included in this analysis, they represent only social assistance businesses.

reported in smaller workplaces, and workers with self-limiting symptoms might not be tested. Outbreaks in nursing homes, detention centers, and education settings were not included in this analysis, and thus, the relative impact of COVID-19 in industry sectors represented by those workers were not assessed. Second, worker-to-worker transmission could not be confirmed; some workplace outbreak-associated cases will represent community and household transmission, or transmission between coworkers outside of work (e.g., commuting to work or social gatherings). Third, individual occupation data were unavailable, so assumptions about the types of affected workers (e.g., frontline workers) cannot be confirmed. Gathering detailed individual occupation data during case investigations might help inform more targeted risk-mitigation interventions within sectors by identifying types of work and workers at highest risk for SARS-CoV-2 infection. Fourth, the stayat-home directives in effect in Utah during the study period likely differentially affected workplace attendance in different sectors (e.g., more telework in information than in construction sectors); therefore, these findings might not be generalizable to states with different restriction levels and sector workforce distributions. Fifth, it is not known to what extent workers in these sectors were familiar with, able, and willing to follow guidance to prevent and reduce the spread of SARS-CoV-2. Finally, workforce estimates used to calculate the outbreak incidence rates by sector could not be adjusted to account for workers in health care, educational, and congregate-living settings that were excluded from this analysis, resulting in underestimated rates; outbreak incidence rates for the Educational Services sector (NAICS code 61) and Health Care and Social Services sector (NAICS code 62) were likely most affected by this limitation.

Understanding the distribution of workplace outbreaks across industry sectors can help health departments identify and target industries where additional guidance and intervention to mitigate SARS-CoV-2 transmission might be needed. Abbreviations: COVID-19 = coronavirus disease 2019; ICU = intensive care unit. * P-values based on chi-squared tests and excludes missing categories; level of significance = p<0.05. † Persons with COVID-19 were classified as having a severe outcome if they were admitted to an ICU, required mechanical ventilation, or died; they were classified as not having a severe outcome if they were not admitted to an ICU, did not require mechanical ventilation, and did not die.

What is already known about this topic?

COVID-19 outbreaks occur within various workplaces.

What is added by this report?

During March 6-June 5, 2020, workplace outbreaks occurred in 15 Utah industry sectors; 58% of workplace outbreak-associated COVID-19 cases were in three sectors: Manufacturing, Wholesale Trade, and Construction. Despite representing 24% of Utah workers in all affected sectors, Hispanic and nonwhite workers accounted for 73% of workplace outbreak-associated COVID-19 cases.

What are the implications for public health practice?

Sector-specific COVID-19 guidance should be followed. Mitigation strategies should be culturally and linguistically responsive to racial/ethnic minority workers disproportionately affected by COVID-19. Collection of detailed case occupation data is needed to understand types of work where exposure risk is highest.

Further, health departments should consider obtaining case occupation data to better understand workplace outbreaks to inform more targeted interventions. The overrepresentation of Hispanic and nonwhite workers in frontline occupations has resulted in disproportionate disease incidence among racial/ ethnic minority groups. Care must be taken to ensure that prevention and mitigation strategies are applied equitably and effectively using culturally and linguistically responsive materials, media, and messages to workers of racial and ethnic minority groups disproportionately affected by COVID-19.

All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. No potential conflicts of interest were disclosed. * Sectors are sorted on absolute disparity between the percentage of Hispanic/Latino and nonwhite workers among workplace outbreak cases and the percentage of Hispanic/Latino and nonwhite workers in the overall industry workforce, in descending order. † Nonwhite includes the following (all non-Hispanic): black or African American, American Indian or Alaska Native, Asian, Native Hawaiian or Other Pacific Islander, two or more races, or other race groups. § Sector workforce demographics from U.S. Census Quarterly Workforce Indicators, Utah 2019 (third quarter); https://qwiexplorer.ces.census.gov/static/explore.html. ¶ Industry sectors are based on the North American Industry Classification System (https://www.census.gov/eos/www/naics/). Because of small case numbers and similarities in sector processes and settings, Professional, Scientific, and Technical Services and Information sectors were combined into a single category, as were Finance and Insurance, Real Estate, Rental and Leasing, and Public Administration.

COVID-19 surveillance staff members; COVID-19 task force and clearance reviewers, CDC. Corresponding author: David Bui

Salt Lake County Health Department

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