Occupational Exposure to Environmental Tobacco Smoke

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Abstract
To the Editor. —The article by Dr Hammond and colleagues,1reporting high measured levels of nicotine in occupational settings without smoking restrictions, even exceeding those from some household studies, underscores concerns about the health risks associated with workplace exposure to ETS. To the degree that nicotine serves as a marker of ETS, these data are consistent with the finding that point estimates for the relative risks associated with workplace sources of exposure were somewhat higher than those associated with adult exposures from a spouse or other household members in our study of ETS and lung cancer among women who were lifetime never-smokers.2 The evidence offered by Hammond et al regarding the potentially high historical levels of exposure to important constituents of ETS among nonsmoking workers in various settings without smoking restrictions prompted us to examine more closely the effect of workplace ETS exposure on risk of lung cancer

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