How the Industrial Physician Can Reduce Mortality from Asbestos-Related Diseases

Our plain-English summary of How the Industrial Physician Can Reduce Mortality from Asbestos-Related Diseases, by R.J. Levine (1978).

The study

• Author: R.J. Levine
• Published: Reprinted from Journal of Occupational Medicine 20(70):454-458 July (1978)
• Type of article: Journal article
• Our copy: from Johns-Manville's own medical library. The article is still under copyright, so we describe it here rather than post it.

In plain English

This article was a review, written for industrial physicians, of risk indicators and early-detection methods for asbestos-related diseases. It covered cancers of the lung, larynx and alimentary tract, mesothelioma, and asbestosis, and reported no new data from a study group. The author argued that the best medical way to reduce deaths was to spot particularly susceptible people at pre-employment examinations and recommend they not be hired for jobs involving asbestos exposure. Exposed workers should be enrolled in medical screening and urged not to smoke. These suggestions assumed that other risk factors, like smoking, act synergistically with asbestos, and the author said the evidence was incomplete. The author described lung cancer as the most frequent asbestos-related cancer, said mesotheliomas were at that time uniformly fatal, and noted that lung cancer screening had not yet proved more than marginally beneficial. The author proposed an experimental examination protocol, including sputum cytology, chest x-rays and questionnaires, and stressed that its real benefits, if any, were unknown.

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: Review and commentary (no new study data) evaluating risk indicators and early-detection methods for asbestos-related diseases, with recommendations for industrial physicians
• Who was studied: No study population; the review is addressed to industrial physicians and concerns job applicants and workers exposed to asbestos
• Exposure: Occupational asbestos exposure in general; the author also discusses miners and millers of chrysotile asbestos, in connection with a technique under development for estimating lung asbestos burden
• Main results:
  • The author described lung cancer as the most frequent asbestos-related cancer and the one causing the heaviest mortality at the time
  • The author noted that screening programs for early detection of lung cancer had not yet proved more than marginally beneficial
  • The author stated that, citing the literature, alimentary tract cancers occur about twice as frequently among heavily exposed asbestos workers as in the general population. Risk factors relevant only to these cancers were judged probably insufficient grounds for denying employment, except where the risk is very great
  • The author said persons who have had an asbestos-related pleural effusion may be at greater risk of mesothelioma and should be removed from asbestos exposure
  • The author stated that mesotheliomas were at present uniformly fatal, and that screening for their early detection beyond what is done for lung cancer was of no clinical value
  • The author suggested that biennial fecal occult blood testing and an oral cavity examination may be considered for asbestos workers 40 years old and older, especially those with 20 or more years since first exposure
• The authors' conclusion: The author concluded that the best medical means of reducing mortality from asbestos-related diseases is to recognize particularly susceptible persons at pre-employment examination and recommend they not be hired for asbestos jobs. Workers necessarily exposed should be enrolled in medical screening and urged not to smoke
• Limitations the authors state:
  • The author stated that the evidence for these recommendations is incomplete
  • The recommendations rest on the hypothesis that other risk factors, like smoking, act synergistically with asbestos
  • The judgment about alimentary tract cancer risk factors is based exclusively on studies from Europe and North America and may not apply where these cancers are common, such as Japan
  • The author emphasized that the real benefits, if any, of the proposed screening protocol were unknown

Topics

Medical terms in this study, explained in our Lexicon: Mesothelioma, Asbestos Exposure, Lung Cancer, Low-Dose CT Screening, Sputum, Cytology, Chest X-Ray.

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