Article: Children's exposure to environmental tobacco smoke: using diverse exposure metrics to document ethnic/racial differences.(Children's Health)

Four metrics were used to assess exposure to environmental tobacco smoke (ETS) for a probability sample (n = 152) of elementary school-age children in two economically disadvantaged neighborhoods: a) caregiver responses to a baseline questionnaire (BQ) about smoking status and behavior; b) 48-hr time-activity (T-A) data on location and time spent by children in the presence of tobacco smoke; c) total urinary cotinine as a marker for nicotine uptake; and d) urinary NNAL [4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol] + NNAL-Gluc [4-(methylnitrosamino)-1-(3-pyridyl)-1-(O-[beta]-D-glucopyranuronosyl)butane] as a marker for uptake of the tobacco-specific lung carcinogen ...

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