SARS‐CoV‐2 infection among Colorado adults working outside the home: Occupation, race and ethnicity and mask use

Abstract

ObjectivesThe workplace is an important setting for severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) exposure and transmission. Using data from a large case–control study in Colorado during 2021 and 2022, we aimed to evaluate working outside the home and SARS‐CoV‐2 infection, the racial and ethnic distribution of workers in occupations associated with infection, and workplace face mask use.MethodsCases were Colorado adults with a positive SARS‐CoV‐2 test by reverse transcription‐polymerase chain reaction (RT‐PCR) reported to Colorado's COVID‐19 surveillance system selected from surveillance data ≤12 days after their specimen collection date. Control participants were randomly selected adult Coloradans with a RT‐PCR‐confirmed negative SARS‐CoV‐2 test result reported to the same surveillance system.ResultsWorking outside the home was associated with infection (odds ratio [OR] = 1.46, 95% confidence interval [CI]: 1.39–1.54). Among participants working outside the home, “Food Preparation and Serving Related” (aOR = 2.35, 95% CI: 1.80–3.06), “Transportation and Material Moving” (aOR = 2.09, 95% CI: 1.62–2.69), “Construction and Extraction” (aOR = 1.88, 95% CI: 1.36–2.59), “Protective Service” (aOR = 1.60, 95% CI: 1.15–2.24), and “Sales and Related” (aOR = 1.44, 95% CI: 1.22–1.69) were occupational categories most strongly associated with infection. American Indian/Alaskan Native, Black, and Hispanic/Latino participants were more likely than others to work in occupational categories with the highest odds of infection (p < 0.05). Cases were less likely than controls to report always wearing a mask (31.9% vs. 41.5%) and wearing a KN95/N95/KF94 mask (16.8% vs. 27.2%) at work.ConclusionsThese findings emphasize the importance of occupation and workplace mask use in the COVID‐19 pandemic and its disproportionate racial/ethnic impact on workers.