A retrospective assessment of occupational exposure to elemental carbon in the US trucking industry.
Vermeulen R; Attfield M; Stewart PA; Coble JB; Blair A; Lubin JH; Silverman DT
Environ Health Perspect 2012 Aug; 120(8):A302
The widespread use of diesel engines has raised concerns regarding the potential health effects from diesel exhaust (DE) exposure. We recently published four papers on the historical exposure assessment of DE in eight non-metal mining facilities (Coble et al. 2010; Stewart et al. 2010; Vermeulen et al. 2010a, 2010b) as part of a cohort and lung cancer case-control study among non-metal miners. Davis et al. (2011) commented recently that our exposure assessment may have had exposure misclassification bias because of our use of carbon monoxide (CO) for historical extrapolation of current respirable elemental carbon (EC) exposure levels. Here we clarify our use of CO to back-extrapolate underground EC levels. Although our estimates are subject to random variation, there is no evidence that there were systematic biases that would have caused differential exposure misclassification.
Truck-drivers; Trucking; Diesel-emissions; Diesel-exhausts; Exposure-assessment; Mining-industry; Mining-equipment; Underground-mining; Nonmetal-mining; Statistical-quality-control; Quality-control; Surveillance
Debra T. Silverman, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
Environmental Health Perspectives