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Mesothelioma among Motor Vehicle Mechanics: An Updated Review and Meta-analysis
David H Garabrant1, Dominik D Alexander2, Paula E Miller2
1EpidStat Institute, 2100 Commonwealth Blvd, Suite 203, Ann Arbor, MI 48105, USA; University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA; david@epidstat.com.
The Annals of Occupational Hygiene
|August 31, 2015
Summary
This meta-analysis found no increased risk of mesothelioma for motor vehicle mechanics, even those performing brake repairs. The updated evidence confirms previous findings, ensuring worker safety and informing occupational health guidelines.
Area of Science:
- Occupational Health
- Epidemiology
- Environmental Health
Background:
- Previous meta-analysis in 2004 examined the link between motor vehicle mechanics and mesothelioma.
- Several new studies have been published since the last review.
- An updated systematic review and meta-analysis were needed to reassess the current evidence.
Purpose of the Study:
- To update the scientific understanding of mesothelioma risk in motor vehicle mechanics.
- To analyze studies on general motor vehicle mechanics and those specifically in brake repair.
- To provide current evidence on occupational exposure and cancer risk.
Main Methods:
- Comprehensive PubMed search conducted through May 2014.
- Included studies reporting relative risk estimates for mesothelioma in mechanics.
- Random-effects meta-analyses used to calculate summary relative risk estimates (SRREs) and confidence intervals (CIs).
- Heterogeneity assessed using Q-test P-values and I-squared estimates.
- Sub-group and sensitivity analyses performed based on study characteristics and quality.
Main Results:
- Sixteen studies (10 case-control, 1 cohort, 5 PMR/SMOR) were included.
- Overall SRRE for all studies was 0.80 (95% CI: 0.61-1.05), with significant heterogeneity.
- High-quality Tier 1 studies showed no heterogeneity and an SRRE of 0.76 (95% CI: 0.46-1.25).
- SRRE for brake repair work specifically was 0.64 (95% CI: 0.38-1.09).
Conclusions:
- Epidemiologic studies indicate motor vehicle mechanics are not at increased risk for mesothelioma.
- This includes workers specifically engaged in brake repair.
- The findings support current occupational safety standards for this profession.
