Asbestos exposure and airways obstruction

Our plain-English summary of Asbestos exposure and airways obstruction, by M.G. Pearson (Respiratory Medicine, 1991).

The study

• Author: M.G. Pearson
• Journal: Respiratory Medicine
• Published: 1991;85(4):344-6
• Type of article: Comment, Letter
• Cited by: 1 article, as counted by NIH iCite
• Read it: PubMed · Publisher

In plain English

This was a letter to the editor, not a research study, and it reported no new data. The author challenged a 1990 study by Kilburn and colleagues in the same journal, which claimed that asbestos exposure was associated with airways obstruction. The author argued that the study's subjects were volunteers wondering whether they had asbestosis or other lung disease, so they may have included more people with symptoms than the shipyard workforce as a whole. The author also noted that the study did not say how many subjects were smokers. The author argued that smoking histories given in hindsight are often underestimates in men aware of possible compensation claims, and that applying a whole-population smoking correction to such a selected group was 'statistical nonsense'. The author suggested analysing non-smokers separately, or adding smoking to the regression analysis as pack years. The author also questioned the study's undefined choice of 'best effort' spirometry and its measurement of total lung capacity from chest X-rays. The author concluded that the claims should be treated extremely cautiously and not used in medico-legal claims until independently verified.

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: Letter to the editor critiquing a published study (Kilburn et al., Respir Med 1990); no new data
• Who was studied: No population was studied by the author. The letter discusses the Kilburn et al. study population: volunteer shipyard workers who were wondering whether they had asbestosis or other lung disease.
• Exposure: Asbestos exposure in shipyard work, as examined in the Kilburn et al. study. The letter names no fiber types.
• Main results:
  • The author argued that selecting volunteers may have produced a greater proportion of workers with symptoms from any cause than in the workforce as a whole.
  • The author noted that the study did not report how many subjects were smokers.
  • The author argued that retrospective smoking histories are often underestimates in men aware of possible compensation claims.
  • The author argued that applying a smoking correction derived from a whole population to this selected group was invalid.
  • The author said the study's non-smokers should have been analysed separately, or smoking added to the regression analysis as pack years.
  • The author questioned the study's undefined 'best effort' spirometry and its measurement of total lung capacity from chest X-rays.
• The authors' conclusion: The author concluded that the study's claims should be treated extremely cautiously and should not be used as evidence in medico-legal claims until independently verified.

Topics

Medical terms in this study, explained in our Lexicon: Asbestos Exposure.

Related studies

• Auscultated forced expiratory time as a clinical and epidemiologic test of airway obstruction — D.G. Kern, S.R. Patel (1991)
• The relative importance of clinical, radiological and pulmonary function variables in evaluating asbestosis and chronic obstructive airway disease in asbestos workers — G.M. Regan, B. Tagg, et al. (1971)
• Airways obstruction from asbestos exposure. Effects of asbestosis and smoking — K.H. Kilburn, R.H. Warshaw (1994)
• Does asbestos exposure cause airway obstruction, in the absence of confirmed asbestosis? — J. Ameille, M. Letourneux, et al. (2010)
• Review of the Kilburn and Warshaw Chest article--airways obstruction from asbestos exposure — R.N. Jones, H.W. Glindmeyer, et al. (1995)
• Airway obstruction in asbestos-exposed shipyard workers: with and without irregular opacities — K.H. Kilburn, R.H. Warshaw (1990)

Browse more research in Respiratory Medicine, or return to medical research.