Barbara Hudson-Hanley1, Ellen Smit2, Adam Branscum3, Perry Hystad4, Molly L Kile4. 1. Oregon State University, College of Public Health & Human Sciences, Environmental & Occupational Health Program, Corvallis, OR, USA. Electronic address: barbara.hanley@lifetime.oregonstate.edu. 2. Oregon State University, College of Public Health & Human Sciences, Epidemiology Program, Corvallis, OR, USA. 3. Oregon State University, College of Public Health & Human Sciences, Biostatistics Program, Corvallis, OR, USA. 4. Oregon State University, College of Public Health & Human Sciences, Environmental & Occupational Health Program, Corvallis, OR, USA.
Abstract
BACKGROUND: Recent studies indicate airborne PAH levels have decreased in the U.S., but it is unclear if this has resulted in PAH exposure changes in the U.S. OBJECTIVE: Examine temporal trends in urinary metabolites of Naphthalene, Fluorene, Phenanthrene, and Pyrene in U.S. non-smokers, 6+ years old. METHODS: We used biomonitoring data from the National Health and Nutrition Examination Survey (NHANES) program, 2001-2014, (N = 11,053) using survey weighted linear regression. Models were adjusted for age, sex, race/ethnicity, creatinine, BMI, income, diet, and seasonality. Stratified models evaluated the effect of age, sex, and race/ethnicity on trends. RESULTS: Between 2001 and 2014, Naphthalene exposure increased 36% (p < 0.01); Pyrene exposure increased 106% (p < 0.01); Fluorene and Phenanthrene exposure decreased 55% (p < 0.01), and 37% (p < 0.01), respectively. Naphthalene was the most abundant urinary PAH, 20-fold higher than Fluorene and Phenanthrene, and over 50-fold higher than Pyrene compared to reference groups, effect modification was observed by age (Naphthalene, Pyrene), sex (Fluorene, Pyrene), and race/ethnicity (Naphthalene, Fluorene, Phenanthrene, Pyrene). SIGNIFICANCE: This study shows exposure to Naphthalene and Pyrene increased, while exposure to Fluorene and Phenanthrene decreased among the non-smoking U.S. general population between 2001 and 2014, suggesting environmental sources of PAHs have changed over the time period.
BACKGROUND: Recent studies indicate airborne PAH levels have decreased in the U.S., but it is unclear if this has resulted in PAH exposure changes in the U.S. OBJECTIVE: Examine temporal trends in urinary metabolites of Naphthalene, Fluorene, Phenanthrene, and Pyrene in U.S. non-smokers, 6+ years old. METHODS: We used biomonitoring data from the National Health and Nutrition Examination Survey (NHANES) program, 2001-2014, (N = 11,053) using survey weighted linear regression. Models were adjusted for age, sex, race/ethnicity, creatinine, BMI, income, diet, and seasonality. Stratified models evaluated the effect of age, sex, and race/ethnicity on trends. RESULTS: Between 2001 and 2014, Naphthalene exposure increased 36% (p < 0.01); Pyrene exposure increased 106% (p < 0.01); Fluorene and Phenanthrene exposure decreased 55% (p < 0.01), and 37% (p < 0.01), respectively. Naphthalene was the most abundant urinary PAH, 20-fold higher than Fluorene and Phenanthrene, and over 50-fold higher than Pyrene compared to reference groups, effect modification was observed by age (Naphthalene, Pyrene), sex (Fluorene, Pyrene), and race/ethnicity (Naphthalene, Fluorene, Phenanthrene, Pyrene). SIGNIFICANCE: This study shows exposure to Naphthalene and Pyrene increased, while exposure to Fluorene and Phenanthrene decreased among the non-smoking U.S. general population between 2001 and 2014, suggesting environmental sources of PAHs have changed over the time period.
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