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Related Experiment Videos

Unrecognized asbestos-induced disease

M C Barroetavena1, K Teschke, D V Bates

  • 1Department of Health Care & Epidemiology, University of British Columbia, Vancouver, Canada.

American Journal of Industrial Medicine
|February 1, 1996
PubMed
Summary
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Occupational cancers, particularly lung cancer from asbestos exposure, are significantly under-reported. Many cases are unrecognized, suggesting a need for better occupational disease surveillance and recognition.

Area of Science:

  • Occupational health
  • Epidemiology
  • Cancer research

Background:

  • Occupational cancers are often under-reported, meaning diseases that develop due to workplace exposures are not accurately identified.
  • Asbestos exposure is a known cause of lung cancer and mesothelioma, but the relationship between these cancers requires further investigation.
  • Existing data suggests a discrepancy between reported and expected rates of asbestos-related lung cancer.

Purpose of the Study:

  • To investigate the under-reporting of occupationally related cancers, specifically focusing on asbestos exposure.
  • To compare reported lung cancer and mesothelioma cases linked to asbestos exposure with expected epidemiological rates.
  • To assess the role of radiological asbestosis in the risk of lung cancer following asbestos exposure.

Main Methods:

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  • Analysis of data from Workers' Compensation Boards in New South Wales, Australia, and British Columbia, Canada (1980-1994).
  • Comparison of observed lung cancer to mesothelioma ratios with established epidemiological findings.
  • Evaluation of the necessity of radiological asbestosis for increased lung cancer risk.

Main Results:

  • Significant under-reporting of occupationally related lung cancer due to asbestos exposure was identified.
  • In combined data from 1980-1994, approximately 1,207 lung cancer cases attributable to asbestos exposure were unrecognized as occupationally related.
  • The ratio of lung cancer to mesothelioma cases was lower than expected, indicating under-ascertainment of occupational lung cancer.
  • Radiological asbestosis is unlikely to be a prerequisite for increased lung cancer risk from asbestos exposure.

Conclusions:

  • There is substantial under-reporting of occupational lung cancer, particularly from asbestos exposure.
  • Current surveillance systems may fail to identify many asbestos-related lung cancers.
  • The presence of radiological asbestosis is not essential for asbestos to increase lung cancer risk.