Evidence map›Paper›PMID 25782115›Full record

ArticleEnvironmental health perspectives2015

Measurement of Total and Free Urinary Phenol and Paraben Concentrations over the Course of Pregnancy: Assessing Reliability and Contamination of Specimens in the Norwegian Mother and Child Cohort Study.

Virginia T Guidry, Matthew P Longnecker, Heidi Aase, Merete Eggesbø, Pål Zeiner, Ted Reichborn-Kjennerud, Gun P Knudsen, Randi J Bertelsen, Xiaoyun Ye, Antonia M Calafat and 1 more

Abstract read
In one paragraph

Article in Environmental health perspectives, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

37 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Virginia T GuidryDepartment of Epidemiology, UNC Gillings School of Global Public Health, Chapel Hill, North Carolina, USA.
Matthew P Longnecker
Heidi Aase
Merete Eggesbø
Pål Zeiner
Ted Reichborn-Kjennerud
Gun P Knudsen
Randi J Bertelsen
Xiaoyun Ye
Antonia M Calafat
Stephanie M Engel

Funding

UNC-CH CENTER FOR ENVIRONMENTAL HEALTH &SUSCEPTIBILITYP30ES010126 · NIEHS · UNIV OF NORTH CAROLINA CHAPEL HILL · PI Stephanie Engel · 2001 to 2026
$36.3M
Biostatstics for Research in Environmental HealthT32ES007018 · NIEHS · UNIV OF NORTH CAROLINA CHAPEL HILL · PI Stephanie Engel, Rebecca Fry · 1985 to 2026
$31.3M
Gene-Environment Interactions in an Autism Birth CohortU01NS047537 · NINDS · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI LIPKIN, W. IAN · 2003 to 2013
$27.0M
The Norwegian Mother And Child Study: Environmental Specimen CollectionZIAES044008 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2009 to 2018
$4.3M
Prenatal Toxicant Exposure and Risk of Attention-Deficit Hyperactivity DisorderR01ES021777 · NIEHS · UNIV OF NORTH CAROLINA CHAPEL HILL · PI ENGEL, STEPHANIE · 2012 to 2016
$2.8M
NIEHS NIH HHS ES07018NIEHS NIH HHS N01 ES075558NIEHS NIH HHS P30 ES010126NIEHS NIH HHS P30ES010126NIEHS NIH HHS R01 ES021777NIEHS NIH HHS R01ES021777NIEHS NIH HHS T32 ES007018NINDS NIH HHS U01 NS047537NINDS NIH HHS UO1 NS 047537-01NINDS NIH HHS UO1 NS047537-06A1
6 · The paper itself

Abstract

backgroundExposures to environmental phenols and parabens may be harmful, especially in utero. Prior studies have demonstrated high within-person variability of urinary concentrations across pregnancy.

objectivesWe sought to measure phenol and paraben biomarker concentrations for the Norwegian Mother and Child Cohort (MoBa) study, assess within-person variability, and investigate any possible external phenol or paraben contamination of specimens.

methodsWe collected three spot urine samples at approximately 17, 23, and 29 weeks gestation in a hospital setting and added a preservative containing ethyl paraben. We measured urinary concentrations and within-person variability for phenols and parabens in a MoBa sample (n = 45), including a subgroup of 15 participants previously randomly selected for a bisphenol A (BPA) exposure study who had unusually high total BPA concentrations. Additionally, we compared reliability results for total, conjugated, and free concentrations of phenolic compounds.

resultsWe detected total and free BPA, butyl paraben, propyl paraben, and methyl paraben in 100% of samples, total benzophenone-3 in 95% of samples, and infrequently detected free benzophenone-3 and total and free 2,4-dichlorophenol and 2,5-dichlorophenol. Intraclass correlation coefficients (ICCs) for total, conjugated, and free concentrations ranged from relatively low for BPA to moderate for propyl paraben. ICCs were generally similar overall and by subgroup.

conclusionsUsing conjugated concentrations improved reliability estimates only for BPA. Measuring total and free concentrations, an approach that may be useful for future studies, allowed us to identify likely BPA and butyl paraben contamination of archived MoBa urine specimens.

Indexed as

AdultBenzhydryl CompoundsBiomarkersBisphenol A CompoundsChlorophenolsCohort StudiesEnvironmental ExposureFemaleHumansNorwayParabensPhenolsPregnancyPreservatives, PharmaceuticalReproducibility of ResultsBenzhydryl CompoundsBiomarkersbisphenol ABisphenol A CompoundsChlorophenolsParabensPhenolsPreservatives, Pharmaceutical

Identifiers

PMID25782115
PMCPMC4492266

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.