A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada
Despite numerous studies of asbestos workers in the epidemiologic literature, there are very few cohort studies of chrysotile asbestos miners/millers that include high-quality retrospective exposure assessments. As part of the creation of the Baie Verte Miners’ Registry in 2008, a two-dimensional jo...
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ftpubmed:oai:pubmedcentral.nih.gov:7807417 2023-05-15T15:35:46+02:00 A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada Giles Murphy, Tina Bornstein, Stephen Oudyk, John Demers, Paul A 2020-09-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807417/ http://www.ncbi.nlm.nih.gov/pubmed/32959879 https://doi.org/10.1093/annweh/wxaa092 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807417/ http://www.ncbi.nlm.nih.gov/pubmed/32959879 http://dx.doi.org/10.1093/annweh/wxaa092 © The Author(s) 2020. Published by Oxford University Press on behalf of the British Occupational Hygiene Society. https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) Ann Work Expo Health Original Articles Text 2020 ftpubmed https://doi.org/10.1093/annweh/wxaa092 2021-09-26T00:21:05Z Despite numerous studies of asbestos workers in the epidemiologic literature, there are very few cohort studies of chrysotile asbestos miners/millers that include high-quality retrospective exposure assessments. As part of the creation of the Baie Verte Miners’ Registry in 2008, a two-dimensional job exposure matrix (JEM) was developed for estimating asbestos exposures for former chrysotile asbestos miners/millers. Industrial hygiene data collected between 1963 and 1994 were analysed to assess validity for use in a retrospective exposure assessment and epidemiologic study. Registered former employees were divided into 52 exposure groups (EGs) based on job title and department and mean asbestos concentrations were calculated for each EG. The resulting exposure estimates were linked to individual registrants’ work histories allowing for the calculation of cumulative asbestos exposure for each registrant. The distribution of exposure for most EGs (82.6%) could be described as fitting a log-normal distribution, although variability within some EGs (55%) exceeded a geometric standard deviation (GSD) of 2.5. Overall, the data used to create EGs in the development of the JEM were deemed to be of adequate quality for estimating cumulative asbestos exposures for the former employees of the Baie Verte asbestos mine/mill. The variability between workers in the same job was often high and is an important factor to be considered when using estimates of cumulative asbestos exposure to adjudicate compensation claims. The exposures experienced in this cohort were comparable to those of other chrysotile asbestos miners/millers cohorts, specifically Italian and Québec cohorts. Text Baie Verte PubMed Central (PMC) Baie Verte ENVELOPE(-56.182,-56.182,49.933,49.933) Canada Verte ENVELOPE(141.192,141.192,-66.740,-66.740) Annals of Work Exposures and Health 65 1 113 126 |
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Original Articles Giles Murphy, Tina Bornstein, Stephen Oudyk, John Demers, Paul A A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada |
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Original Articles |
description |
Despite numerous studies of asbestos workers in the epidemiologic literature, there are very few cohort studies of chrysotile asbestos miners/millers that include high-quality retrospective exposure assessments. As part of the creation of the Baie Verte Miners’ Registry in 2008, a two-dimensional job exposure matrix (JEM) was developed for estimating asbestos exposures for former chrysotile asbestos miners/millers. Industrial hygiene data collected between 1963 and 1994 were analysed to assess validity for use in a retrospective exposure assessment and epidemiologic study. Registered former employees were divided into 52 exposure groups (EGs) based on job title and department and mean asbestos concentrations were calculated for each EG. The resulting exposure estimates were linked to individual registrants’ work histories allowing for the calculation of cumulative asbestos exposure for each registrant. The distribution of exposure for most EGs (82.6%) could be described as fitting a log-normal distribution, although variability within some EGs (55%) exceeded a geometric standard deviation (GSD) of 2.5. Overall, the data used to create EGs in the development of the JEM were deemed to be of adequate quality for estimating cumulative asbestos exposures for the former employees of the Baie Verte asbestos mine/mill. The variability between workers in the same job was often high and is an important factor to be considered when using estimates of cumulative asbestos exposure to adjudicate compensation claims. The exposures experienced in this cohort were comparable to those of other chrysotile asbestos miners/millers cohorts, specifically Italian and Québec cohorts. |
format |
Text |
author |
Giles Murphy, Tina Bornstein, Stephen Oudyk, John Demers, Paul A |
author_facet |
Giles Murphy, Tina Bornstein, Stephen Oudyk, John Demers, Paul A |
author_sort |
Giles Murphy, Tina |
title |
A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada |
title_short |
A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada |
title_full |
A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada |
title_fullStr |
A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada |
title_full_unstemmed |
A Quantitative Retrospective Exposure Assessment for Former Chrysotile Asbestos Miners and Millers from Baie Verte, NL, Canada |
title_sort |
quantitative retrospective exposure assessment for former chrysotile asbestos miners and millers from baie verte, nl, canada |
publisher |
Oxford University Press |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807417/ http://www.ncbi.nlm.nih.gov/pubmed/32959879 https://doi.org/10.1093/annweh/wxaa092 |
long_lat |
ENVELOPE(-56.182,-56.182,49.933,49.933) ENVELOPE(141.192,141.192,-66.740,-66.740) |
geographic |
Baie Verte Canada Verte |
geographic_facet |
Baie Verte Canada Verte |
genre |
Baie Verte |
genre_facet |
Baie Verte |
op_source |
Ann Work Expo Health |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807417/ http://www.ncbi.nlm.nih.gov/pubmed/32959879 http://dx.doi.org/10.1093/annweh/wxaa092 |
op_rights |
© The Author(s) 2020. Published by Oxford University Press on behalf of the British Occupational Hygiene Society. https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) |
op_doi |
https://doi.org/10.1093/annweh/wxaa092 |
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Annals of Work Exposures and Health |
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65 |
container_issue |
1 |
container_start_page |
113 |
op_container_end_page |
126 |
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1766366118030606336 |