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Biomarkers of Environmental Tobacco Smoke Exposure
Neal L. Benowitz
Environmental Health Perspectives
Vol. 107, Supplement 2 (May, 1999), pp. 349-355
Published by: The National Institute of Environmental Health Sciences
Stable URL: http://www.jstor.org/stable/3434427
Page Count: 7
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Biomarkers are desirable for quantitating human exposure to environmental tobacco smoke (ETS) and for predicting potential health risks for exposed individuals. A number of biomarkers of ETS have been proposed. At present cotinine, measured in blood, saliva, or urine, appears to be the most specific and the most sensitive biomarker. In nonsmokers with significant exposure to ETS, cotinine levels in the body are derived primarily from tobacco smoke, can be measured with extremely high sensitivity, and reflect exposure to a variety of types of cigarettes independent of machine-determined yield. Under conditions of sustained exposure to ETS (i.e., over hours or days), cotinine levels reflect exposure to other components of ETS. Supporting the validity of cotinine as a biomarker, cotinine levels have been positively correlated to the risks of some ETS-related health complications in children who are not cigarette smokers.
Environmental Health Perspectives © 1999 The National Institute of Environmental Health Sciences