NR 518 Week 8 Population Health Paper on Silicosis Example

Population Health Paper: Silicosis Among the County's Engineered Stone Workers, From a Definition to One Response Aimed at the Shop, With the Same Group Held in View Throughout

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College of Nursing, Chamberlain University

NR 518: Population Health and Epidemiology in Nursing Practice

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Month Day, Year

Population Health Paper: Silicosis Among the County's Engineered Stone Workers, From a Definition to One Response Aimed at the Shop, With the Same Group Held in View Throughout

The Group and the Argument

This paper concerns one group: the roughly 2,000 people in our county who cut, grind and polish engineered stone countertops for a living, most of them Latino immigrant men working in small shops. Its argument is that silicosis in this group is preventable, that the evidence points to exposure at the shop as the cause that can be removed, and that the county's main response should be aimed at the shop rather than at individual workers. The paper follows the group from a case definition, through a comparison of exposed and less exposed workers, through the explanations that had to be ruled out, to a response at a named level. It marks the places where the evidence is thinner than the argument would like, and it does not treat the county's teaching data as if they were a published study.

Defining the Group and the Disease

A population health argument depends on counting the same people at every step. The county's definitions, written earlier this term, count a person as a silicosis case when chest CT or lung tissue is consistent with silicosis and there is a documented history of silica work, and as an engineered stone worker after at least six months cutting or finishing the material. These definitions were tested on real records and revised where two nurses disagreed. They also undercount: workers without insurance may never have a CT. In one California case series, 19% of workers with silicosis were uninsured and 39% had restricted-scope coverage (Fazio et al., 2023). The count the county reports is therefore a minimum.

The Scale of the Problem

The problem is large and growing. California's surveillance program confirmed 296 silicosis cases from 2019 to 2024, 243 of them associated with engineered stone; at least 15 of those workers had died, and 60 had been referred for lung transplant (Flattery et al., 2025). By June 2026, the state had identified 592 cases among engineered stone fabrication workers, with 65 lung transplants and 31 deaths (Heinzerling et al., 2026). Our county's share is smaller, but a composite investigation this term found eleven cases linked to four shops on one street in a matter of weeks, and six of those men were still cutting stone.

The Comparison

The central comparison was between workers who mainly dry-cut and those who mainly wet-cut. The county's practice screening dataset, built for teaching and not a published finding, showed a prevalence of 20% in dry-cutting workers and 5% in wet-cutting workers, a prevalence ratio of 4.0. Carried through to people, the difference amounted to roughly 33 people in the screened group and an estimated 165 countywide whose disease was associated with dry cutting. Published work agrees in direction: fewer than half of the workers in the California case series used water suppression (Fazio et al., 2023), and most interviewed workers in Los Angeles described regular dry cutting (Fazio et al., 2025). The county's own evidence, though, is a practice dataset and a one-time screening. It cannot by itself show cause, and the paper does not claim it does.

Explanations That Had to Be Cleared

Three other explanations could produce the same pattern. The first is time: dry cutting was more common in earlier years, so the dry-cutting group may simply carry more total years of dust. The second is shop: a few large, poorly ventilated shops might explain the association rather than the cutting method. The third is who came to screening: sicker workers may have been more likely to attend. None of these can be ruled out with the data in hand. What makes the causal argument strong is not the county's numbers but what is already known: the slabs are overwhelmingly crystalline silica (Rose et al., 2019), silica dust causes silicosis, and wet methods reduce airborne dust. The county's data are consistent with that knowledge; they are not the basis for it. The case-control study and air sampling proposed earlier would address the first two explanations directly.

The Response and Its Level

The response is aimed at the level where the cause sits: the shop. Its core is removing the exposure, with wet cutting, local exhaust ventilation and wet cleaning in every shop, supported by equipment grants and backed by referral for enforcement of the federal silica limit (Occupational Safety and Health Administration, 2016). Around it sit screening at a workers' center to find disease earlier and support for diagnosed workers to leave exposure without losing all income.

The response is deliberately not aimed mainly at individual workers. Interviews show that workers already know dust harms their lungs; they describe unsafe equipment, unreliable respirators and fear of being fired (Fazio et al., 2025). A plan that asked workers to protect themselves would load the work of prevention onto the people least able to change their shop.

Where the Evidence Is Thin

Three gaps remain. Ventilation in local shops is unmeasured; neither state study collected it. It does not know how many workers it has; the figure of 2,000 is an industry estimate. And it does not know whether the program will reduce disease, because new cases will lag exposure by years. The program's plan measures what it can in the meantime: the share of shops using wet methods, air samples below the limit, workers screened and time to diagnosis. These are the right early measures, but they are not the outcome, and the county should keep reporting new cases to the state for as long as it takes to see whether they fall.

Conclusion

From the definition to the recommendation, this paper has discussed the same group, the county's engineered stone workers, and one disease with a known cause. The response follows the cause to the shop, where it can be removed. The evidence for that response is strong where it rests on established science and thinner where it rests on the county's own data, and the paper has tried to say which is which. Statewide, regulatory change has not yet ended hazardous exposure (Heinzerling et al., 2026). A county that acts at the shop, and measures honestly while it waits for the outcome, can make a difference for the workers who have not yet breathed the dust that would make them sick.

References

Fazio, J. C., Gandhi, S. A., Flattery, J., Heinzerling, A., Kamangar, N., Afif, N., Cummings, K. J., & Harrison, R. J. (2023). Silicosis among immigrant engineered stone (quartz) countertop fabrication workers in California. JAMA Internal Medicine, 183(9), 991-998. https://doi.org/10.1001/jamainternmed.2023.3295

Fazio, J. C., Garcia, S. R., Torres, I. R., Gandhi, S. A., Cummings, K. J., Buhr, R. G., Riley, K., Ponce, N., Bustamante, A. V., & Glenn, B. (2025). Silica hazards in engineered stone countertop production: Worker experiences and challenges in Los Angeles. American Journal of Industrial Medicine, 68(10), 867-880. https://doi.org/10.1002/ajim.70010

Flattery, J., Woolsey, C., Fazio, J. C., Gandhi, S. A., Heinzerling, A., Harrison, R. J., & Cummings, K. J. (2025). Silicosis surveillance in California, 2019-2024: Tracking an epidemic. American Journal of Public Health, 115(11), 1913-1921. https://doi.org/10.2105/AJPH.2025.308225

Heinzerling, A., Flattery, J., Cummings, K. J., Harrison, R. J., Fazio, J. C., Gandhi, S. A., Khan, A., & Michaels, D. (2026). Silicosis among workers fabricating engineered stone ("quartz") countertops in California, 2019-2026. NEJM Evidence, 5(9), Article EVIDpha2600187. https://doi.org/10.1056/EVIDpha2600187

Occupational Safety and Health Administration. (2016, March 25). Occupational exposure to respirable crystalline silica. Federal Register, 81, 16286-16890. https://www.federalregister.gov/documents/2016/03/25/2016-04800/occupational-exposure-to-respirable-crystalline-silica

Rose, C., Heinzerling, A., Patel, K., Sack, C., Wolff, J., Zell-Baran, L., Weissman, D., Hall, E., Sooriash, R., McCarthy, R. B., Bojes, H., Korotzer, B., Flattery, J., Weinberg, J. L., Potocko, J., Jones, K. D., Reeb-Whitaker, C. K., Reul, N. K., LaSee, C. R., . . . Harrison, R. (2019). Severe silicosis in engineered stone fabrication workers: California, Colorado, Texas, and Washington, 2017-2019. MMWR. Morbidity and Mortality Weekly Report, 68(38), 813-818. https://doi.org/10.15585/mmwr.mm6838a1