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. 2023 Apr 1;65(4):315-320.
doi: 10.1097/JOM.0000000000002746. Epub 2022 Nov 17.

Mining Tenure and Job Duties Differ Among Contemporary and Historic Underground Coal Miners With Progressive Massive Fibrosis

Lauren M Zell-Baran  1 , Leonard H T Go, Emily Sarver, Kirsten S Almberg, Cayla Iwaniuk, Francis H Y Green, Jerrold L Abraham, Carlyne Cool, Angela Franko, Ann F Hubbs, Jill Murray, Marlene S Orandle, Soma Sanyal, Naseema Vorajee, Robert A Cohen, Cecile S Rose
Affiliations

Mining Tenure and Job Duties Differ Among Contemporary and Historic Underground Coal Miners With Progressive Massive Fibrosis

Lauren M Zell-Baran et al. J Occup Environ Med. .

Abstract

Objective: To characterize differences in mining jobs and tenure between contemporary (born 1930+, working primarily with modern mining technologies) and historic coal miners with progressive massive fibrosis (PMF).

Methods: We classified jobs as designated occupations (DOs) and non-DOs based on regulatory sampling requirements. Demographic, occupational characteristics, and histopathological PMF type were compared between groups.

Results: Contemporary miners ( n = 33) had significantly shorter mean total (30.4 years vs 37.1 years, P = 0.0006) and underground (28.8 years vs 35.8 years, P = 0.001) mining tenure compared with historic miners ( n = 289). Silica-type PMF was significantly more common among miners in non-DOs (30.1% vs 15.8%, P = 0.03) and contemporary miners (58.1% vs 15.2%, P < 0.0001).

Conclusions: Primary jobs changed over time with the introduction of modern mining technologies and likely changed exposures for workers. Elevated crystalline silica exposures are likely in non-DOs and require attention.

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Conflict of interest statement

Conflicts of interest: None declared.

Figures

FIGURE 1
FIGURE 1
Flowchart of study sample selection.
See this image and copyright information in PMC

References

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