Investigating cancer risks related to asbestos and other occupational carcinogens

Our plain-English summary of Investigating cancer risks related to asbestos and other occupational carcinogens, by J. Siemiatycki (Occupational and Environmental Medicine, 2007).

The study

• Author: J. Siemiatycki
• Journal: Occupational and Environmental Medicine
• Published: 2007;64(8):500-1
• Type of article: Editorial
• Cited by: 1 article, as counted by NIH iCite
• Read it: PubMed · Publisher · Free full text

Abstract

There will be little progress without investment in exposure assessment

In plain English

This editorial reported no new data. The author commented on Carel et al's multicentric study in eastern Europe and England. The author wrote that most studies finding high lung cancer risks were cohort studies of workers exposed mainly in 1940–70, whereas studies of more recently exposed workers and case-control studies generally had not found clear evidence of excess risk. The author called the Carel et al overall finding null apart from a small English component and listed possible explanations, including differences in exposure assessment quality. Citing other sources, the author stated that as much as 90% of lung cancer in males and 70% in females is attributable to smoking, and that as much as 20% or more of lung cancer in males in industrialised countries may be preventable in the workplace. The author noted that expert-based exposure assessment is very costly and that retrospective cohort studies have been declining in developed countries. The author concluded that, to the extent population-based case-control studies become the prime design, a cadre of exposure assessment experts must be created and maintained.

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: Editorial commentary on another study (Carel et al) and on methods for studying occupational cancer; no original data
• Who was studied: No population was studied in this article; it discusses the Carel et al multicentric study in eastern Europe and England
• Exposure: Asbestos and other occupational carcinogens in relation to lung cancer; the author notes unresolved questions about risk differences by fibre type, industry and exposure level
• Main results:
  • The author's overview of earlier research: studies of more recently exposed workers and case-control studies have generally not found clear evidence of excess lung cancer risk, unlike earlier cohort studies of workers exposed mainly in 1940–70
  • The author described the Carel et al study's overall finding as null, apart from its small English component
  • Possible explanations the author listed for the difference between eastern Europe and the UK included differences in the quality of exposure assessment or other artefactual conditions
  • Citing other sources, the author stated that as much as 90% of lung cancer among males and 70% among females is attributable to smoking
  • Citing other sources, the author suggested that as much as 20% (or more) of lung cancer among males in industrialised countries may be preventable in the workplace
  • The author noted that few investigators have adopted expert-based exposure assessment because it is very costly
  • The author noted that the number of retrospective cohort studies has been declining in developed countries
• The authors' conclusion: The author concluded that, to the extent that population-based case-control studies become the prime design available, a way must be found to create and maintain a cadre of experts who can carry out the needed exposure assessment

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