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- W1967401911 abstract "There is interest in using residential dust to estimate human exposure to environmental contaminants.We aimed to characterize the sources of variability for polycyclic aromatic hydrocarbons (PAHs) in residential dust and provide guidance for investigators who plan to use residential dust to assess exposure to PAHs.We collected repeat dust samples from 293 households in the Northern California Childhood Leukemia Study during two sampling rounds (from 2001 through 2007 and during 2010) using household vacuum cleaners, and measured 12 PAHs using gas chromatography-mass spectrometry. We used a random- and a mixed-effects model for each PAH to apportion observed variance into four components and to identify sources of variability.Median concentrations for individual PAHs ranged from 10 to 190 ng/g of dust. For each PAH, total variance was apportioned into regional variability (1-9%), intraregional between-household variability (24-48%), within-household variability over time (41-57%), and within-sample analytical variability (2-33%). Regional differences in PAH dust levels were associated with estimated ambient air concentrations of PAH. Intraregional differences between households were associated with the residential construction date and the smoking habits of residents. For some PAHs, a decreasing time trend explained a modest fraction of the within-household variability; however, most of the within-household variability was unaccounted for by our mixed-effects models. Within-household differences between sampling rounds were largest when the interval between dust sample collections was at least 6 years in duration.Our findings indicate that it may be feasible to use residential dust for retrospective assessment of PAH exposures in studies of health effects." @default.
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- W1967401911 date "2013-05-01" @default.
- W1967401911 modified "2023-09-29" @default.
- W1967401911 title "Polycyclic Aromatic Hydrocarbons in Residential Dust: Sources of Variability" @default.
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- W1967401911 doi "https://doi.org/10.1289/ehp.1205821" @default.
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