期刊
AMERICAN JOURNAL OF EPIDEMIOLOGY
卷 187, 期 6, 页码 1210-1219出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/aje/kwy038
关键词
cohort studies; data sharing; diesel exhaust; lung cancer; mine workers; radon; vehicle emissions
资金
- Truck and Engine Manufacturers Association
- Research Data Center
- National Center for Health Statistics
- Centers for Disease Control and Prevention
- National Institute of Occupational Safety and Health
- National Cancer Institute
The Diesel Exhaust in Miners Study (DEMS) (United States, 1947-1997) reported positive associations between diesel engine exhaust exposure, estimated as respirable elemental carbon (REC), and lung cancer mortality. This reanalysis of the DEMS cohort used an alternative estimate of REC exposure incorporating historical data on diesel equipment, engine horsepower, ventilation rates, and declines in particulate matter emissions per horsepower. Associations with cumulative REC and average REC intensity using the alternative REC estimate and other exposure estimates were generally attenuated compared with original DEMS REC estimates. Most findings were statistically nonsignificant; control for radon exposure substantially weakened associations with the original and alternative REC estimates. No association with original or alternative REC estimates was detected among miners who worked exclusively underground. Positive associations were detected among limestone workers, whereas no association with REC or radon was found among workers in the other 7 mines. The differences in results based on alternative exposure estimates, control for radon, and stratification by worker location or mine type highlight areas of uncertainty in the DEMS data.
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