Should Canadian health care professionals support the call for a worldwide ban on asbestos?

Our plain-English summary of Should Canadian health care professionals support the call for a worldwide ban on asbestos?, by J. Siemiatycki (CMAJ, 2001).

The study

• Author: J. Siemiatycki
• Journal: CMAJ
• Published: 2001;164(4):495-7
• Type of article: Comment, Review
• Cited by: 7 articles, as counted by NIH iCite
• Read it: PubMed · Free full text

Summary of the article

In this commentary, the author responded to the Collegium Ramazzini's call, published in the same CMAJ issue, for an international ban on asbestos. He described two schools of thought. One held that all asbestos types are highly carcinogenic, that no exposure level is safe and that asbestos should be banned outright. The other saw differences in risk by fibre type and exposure, and questioned both the relevance of historic cohort risks to current conditions and the safety of substitutes. He noted allegations of self-interest on both sides and Canada's role as a major producer of chrysotile, mined mainly in Quebec. He listed points of broad consensus, such as that most, if not all, types of asbestos can cause lung cancer and mesothelioma. He also listed controversial questions, such as whether chrysotile is less carcinogenic and whether substitutes are safer. He argued that a worldwide ban raised an ethical issue by denying developing countries, now the main market, the choice to import asbestos, and cited DDT and malaria as a cautionary example. He concluded that the call was well-motivated and defensible, but that he was neither confident enough to support it nor convinced it was wrong. He proposed that it be considered by an international panel that excluded people with significant asbestos research experience or interests.

PubMed has no abstract for this study, and the article doesn't print one. We wrote this summary from the full article with the help of AI. It is not the authors' wording.

In plain English

This article was a commentary, not a research study. It responded to a call by the Collegium Ramazzini, published in the same issue, for an international ban on asbestos. The author described two schools of scientific thought. One held that all asbestos types are harmful and should be banned. The other saw differences in risk by fibre type and exposure. The author noted that Canadian asbestos is mostly chrysotile mined in Quebec's Eastern Townships. Among statements the author listed as broadly agreed was that lung cancer and mesothelioma (pleural and peritoneal) can be caused by most, if not all, forms of asbestos. Among questions the author listed as still controversial was whether commercial chrysotile is significantly less carcinogenic than other types. The author also argued that a worldwide ban would limit developing countries' own choices. The author concluded that the call for a ban is largely defensible, but was neither confident it was right nor convinced it was wrong. The author proposed review by an independent international panel. The author disclosed government funding for a study of women in Quebec's asbestos mining towns.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: commentary (opinion article); no original data were collected or analyzed
• Who was studied: No study population; the article discussed the scientific debate on asbestos and the Collegium Ramazzini's call, published in the same issue of CMAJ, for an international ban
• Exposure: Asbestos in general and its substitute products; the author noted that Canadian asbestos is mostly chrysotile from the Eastern Townships region of Quebec
• Main results:
  • The author described one school of thought as holding, among other things, that all types of asbestos are harmful and that there is no safe level of exposure. The author described a second school as seeing differences in risk by fibre type and by the nature of exposure.
  • Among the statements the author listed as having broad consensus: lung cancer and mesothelioma (pleural and peritoneal) can be caused by most, if not all, forms of asbestos.
  • Among the questions the author listed as still controversial: whether commercial chrysotile is significantly less carcinogenic than other types of asbestos.
  • The author argued that a worldwide ban would constrain buyers as well as sellers, taking away developing countries' choice about importing asbestos.
  • The author described the call for a ban as, for the most part, defensible.
  • The author proposed that the ban proposal be considered by an international panel. The author said the panel should exclude people with significant experience or interests in asbestos research.
  • Disclosure (not a finding): the author stated a competing interest, a study of lung cancer and mesothelioma among women in Quebec's asbestos mining towns, funded by Canadian and Quebec government bodies.
• The authors' conclusion: The author concluded that they did not have enough confidence in the Collegium's assertions on the controversial questions to think a ban is the right thing to do. The author added that they were not convinced it is wrong either.
• Limitations the authors state:
  • The author acknowledged that dividing opinion on asbestos into two schools of thought is simplistic.

Topics

Medical terms in this study, explained in our Lexicon: Collegium Ramazzini, Carcinogenic, Chrysotile, Lung Cancer, Mesothelioma.

Related studies

• A ban on asbestos must be based on a comparative risk assessment — M. Camus (2001)
• A ban on asbestos: is now the time? — (2001)
• Asbestos is still with us: Repeat call for a universal ban — C. Ramazzini (2011)
• Managing malignant pleural mesothelioma: experience and perceptions of health care professionals caring for people with mesothelioma — A. Warby, H.M. Dhillon, et al. (2019)
• What should a support program for people with lung cancer look like? Differing attitudes of patients and support group facilitators — B. Devitt, A. Hatton, et al. (2010)
• Experiences of healthcare professionals with support for mesothelioma patients and their relatives: Identified gaps and improvements for care — A.R. Frissen, S. Burgers, et al. (2021)

Browse more research in CMAJ, or return to medical research.