ON THE MEASUREMENT OF TOBACCO USE BY ADOLESCENTS

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Abstract
This study assessed the validtty of self-reporb of smokeless tobacco use by adolescents and the validity of cotinine as a measure of adolescent cigarette smoking. For a sample of 1,854 persons aged 12–14 years living in the southeastern United States in 1885, a combination of three biochemical measures (salivary cotinine, salivary thiocyanate, and alveolar carbon monoxide) and seifrepom of cigarette smoking were used to identify subjects who used only smokeless tobacco and subjects who did not use smokeless tobacco. The sensttivity and specificity of self-reports of smokeless tobacco use were 40.8% and 97.9%, respectively. It was determined that of the 175 subjects who ordinarily would be considered smokers because they had salivary cotlnine levels ≥10 ng/ ml, 43.4% used only smokeless tobacco.

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