Dataset Information

Characterizing Chemical Exposure Trends from NHANES Urinary Biomonitoring Data.

ABSTRACT:

Background

Xenobiotic metabolites are widely present in human urine and can indicate recent exposure to environmental chemicals. Proper inference of which chemicals contribute to these metabolites can inform human exposure and risk. Furthermore, longitudinal biomonitoring studies provide insight into how chemical exposures change over time.

Objectives

We constructed an exposure landscape for as many human-exposure relevant chemicals over as large a time span as possible to characterize exposure trends across demographic groups and chemical types.

Methods

We analyzed urine data of nine 2-y cohorts (1999-2016) from the National Health and Nutrition Examination Survey (NHANES). Chemical daily intake rates (in milligrams per kilogram bodyweight per day) were inferred, using the R package bayesmarker, from metabolite concentrations in each cohort individually to identify exposure trends. Trends for metabolites and parents were clustered to find chemicals with similar exposure patterns. Exposure variation by age, gender, and body mass index were also assessed.

Results

Intake rates for 179 parent chemicals were inferred from 151 metabolites (96 measured in five or more cohorts). Seventeen metabolites and 44 parent chemicals exhibited fold-changes ≥10 between any two cohorts (deltamethrin, di-n-octyl phthalate, and di-isononyl phthalate had the greatest exposure increases). Di-2-ethylhexyl phthalate intake began decreasing in 2007, whereas both di-isobutyl and di-isononyl phthalate began increasing shortly before. Intake for four parabens was markedly higher in females, especially reproductive-age females, compared with males and children. Cadmium and arsenobetaine exhibited higher exposure for individuals >65 years of age and lower for individuals <20 years of age.

Discussion

With appropriate analysis, NHANES indicates trends in chemical exposures over the past two decades. Decreases in exposure are observable as the result of regulatory action, with some being accompanied by increases in replacement chemicals. Age- and gender-specific variations in exposure were observed for multiple chemicals. Continued estimation of demographic-specific exposures is needed to both monitor and identify potential vulnerable populations. https://doi.org/10.1289/EHP12188.

SUBMITTER: Stanfield Z

PROVIDER: S-EPMC10824265 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature

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Characterizing Chemical Exposure Trends from NHANES Urinary Biomonitoring Data.

Stanfield Zachary Z Setzer R Woodrow RW Hull Victoria V Sayre Risa R RR Isaacs Kristin K KK Wambaugh John F JF

Environmental health perspectives 20240129 1

<h4>Background</h4>Xenobiotic metabolites are widely present in human urine and can indicate recent exposure to environmental chemicals. Proper inference of which chemicals contribute to these metabolites can inform human exposure and risk. Furthermore, longitudinal biomonitoring studies provide insight into how chemical exposures change over time.<h4>Objectives</h4>We constructed an exposure landscape for as many human-exposure relevant chemicals over as large a time span as possible to charact ...[more]

PMID: 38285237

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Dataset Information

Characterizing Chemical Exposure Trends from NHANES Urinary Biomonitoring Data.

Background

Objectives

Methods

Results

Discussion

Publications

Characterizing Chemical Exposure Trends from NHANES Urinary Biomonitoring Data.

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