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Cancer in asbestos-exposed occupational cohorts: a meta-analysis
1Exponent Health Group, Landover, MD 20785, USA. mgoodman@exponent.com
Cancer Causes & Control : CCC
|October 26, 1999
Summary
Occupational asbestos exposure is linked to lung cancer, with significant variability. A potential association was also found for laryngeal cancer, but not for other examined cancers.
Area of Science:
- Occupational Epidemiology
- Environmental Health
- Cancer Research
Background:
- Asbestos exposure is a known occupational hazard linked to various cancers.
- Understanding the magnitude of cancer risk associated with asbestos exposure is crucial for public health.
- Existing occupational cohorts provide valuable data for meta-analysis.
Purpose of the Study:
- To quantify the association between occupational asbestos exposure and lung cancer risk using meta-analysis.
- To investigate potential links between asbestos exposure and other cancer sites.
- To explore dose-response relationships for asbestos-related cancers.
Main Methods:
- A meta-analysis was conducted on data from 69 asbestos-exposed occupational cohorts.
- Cancer morbidity and mortality data, including mesothelioma rates, were extracted.
- Meta-standardized mortality ratios (meta-SMRs) were calculated, and heterogeneity was assessed.
Main Results:
- Lung cancer showed significantly elevated meta-SMRs (163 without latency, 148 with latency), with considerable heterogeneity.
- A dose-response effect for lung cancer was observed when stratifying by mesothelioma death percentages.
- Laryngeal cancer also demonstrated elevated meta-SMRs (157 without latency, 133 with latency) with homogeneous results but no dose-response effect.
Conclusions:
- The association between occupational asbestos exposure and lung cancer varies widely across studies.
- A suggestive association exists between asbestos exposure and laryngeal carcinoma.
- No clear association was found between asbestos exposure and gastrointestinal or kidney cancers.
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