Evidence map›Paper›PMID 33767116›Full record

ArticleEpidemiology (Cambridge, Mass.)2021

Prenatal Exposure to Mixtures of Persistent Endocrine-disrupting Chemicals and Birth Size in a Population-based Cohort of British Girls.

Kristin J Marks, Penelope P Howards, Melissa M Smarr, W Dana Flanders, Kate Northstone, Johnni H Daniel, Andreas Sjödin, Antonia M Calafat, Terryl J Hartman

Abstract read
In one paragraph

Article in Epidemiology (Cambridge, Mass.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 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

13 citing papers in PubMed, 2 syntheses or guidelines 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

9 authors.

Kristin J MarksFrom the Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA.
Penelope P HowardsFrom the Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA.
Melissa M SmarrGangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA.
W Dana FlandersFrom the Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA.
Kate NorthstoneDepartment of Population Health Sciences, Bristol Medical School, Oakfield House, Oakfield Grove, Bristol, United Kingdom.
Johnni H DanielNational Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA.
Andreas SjödinNational Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA.
Antonia M CalafatNational Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA.
Terryl J HartmanFrom the Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA.

Funding

Intramural CDC HHS CC999999Medical Research Council G9815508Medical Research Council MC_PC_15018Medical Research Council MC_PC_19009
6 · The paper itself

Abstract

backgroundPrevious studies of endocrine-disrupting chemicals have examined one of these chemicals at a time in association with an outcome; studying mixtures better approximates human experience. We investigated the association of prenatal exposure to mixtures of persistent endocrine disruptors (perfluoroalkyl and polyfluoroalkyl substances [PFAS], polychlorinated biphenyls [PCBs], and organochlorine pesticides) with birth size among female offspring in the Avon Longitudinal Study of Parents and Children (ALSPAC), based in the United Kingdom in 1991-1992.

methodsWe quantified concentrations of 52 endocrine-disrupting chemicals in maternal serum collected during pregnancy at median 15-week gestation. Birth weight, crown-to-heel length, and head circumference were measured at birth; ponderal index and small for gestational age were calculated from these. We used repeated holdout Weighted Quantile Sum (WQS) regression and Bayesian kernel machine regression to examine mixtures in 313 mothers.

resultsUsing WQS regression, all mixtures (each chemical class separately and all three together) were inversely associated with birth weight. A one-unit increase in WQS index (a one-decile increase in chemical concentrations) for all three classes combined was associated with 55 g (β = -55 g, 95% confidence interval [CI] = -89, -22 g) lower birth weight. Associations were weaker but still inverse using Bayesian kernel machine regression. Under both methods, PFAS were the most important contributors to the association with birth weight. We also observed inverse associations for crown-to-heel length.

conclusionsThese results are consistent with the hypothesis that prenatal exposure to mixtures of persistent endocrine-disrupting chemicals affects birth size.

Indexed as

Endocrine DisruptorsEnvironmental PollutantsPrenatal Exposure Delayed EffectsBayes TheoremChildFemaleHumansInfant, NewbornLongitudinal StudiesMaternal ExposurePregnancyUnited KingdomEndocrine DisruptorsEnvironmental Pollutants

Identifiers

PMID33767116
PMCPMC8159871

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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.