Evidence map›Paper›PMID 29897723›Full record

ArticleEnvironmental health perspectives2018

Prenatal Exposure to Perfluoroalkyl Substances and IQ Scores at Age 5; a Study in the Danish National Birth Cohort.

Zeyan Liew, Beate Ritz, Cathrine Carlsen Bach, Robert F Asarnow, Bodil Hammer Bech, Ellen A Nohr, Rossana Bossi, Tine Brink Henriksen, Eva Cecilie Bonefeld-Jørgensen, Jørn Olsen

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 6% of its field
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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 66 citations in OpenAlex.

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  18. World Trade Center Health Program: First Decade of Research.International journal of environmental research and public health · 2020
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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

10 authors at 5 institutions in 3 countries.

Zeyan LiewDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles (UCLA), Los Angeles, California, USA
Beate RitzDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles (UCLA), Los Angeles, California, USA
Cathrine Carlsen BachDepartment of Pediatrics and Adolescent Medicine, Randers Regional Hospital, Randers, Denma
Robert F AsarnowDepartment of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, UCLA, Los Angeles, California, USA
Bodil Hammer BechDepartment of Public Health, Section for Epidemiology, University of Aarhus, Aarhus, Denmark
Ellen A NohrDepartment of Clinical Research, Research Unit for Gynaecology and Obstetrics, University of Southern Denmark, Odense, Denmark
Rossana BossiDepartment of Environmental Science, University of Aarhus, Roskilde, Denmark
Tine Brink HenriksenDepartment of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Skejby, Denmark
Eva Cecilie Bonefeld-JørgensenCentre for Arctic Health and Molecular Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
Jørn OlsenDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles (UCLA), Los Angeles, California, USA
University of California, Los Angeles · USAarhus University · DKAarhus University Hospital · DKIlisimatusarfik · GLUniversity of Southern Denmark · DK

Funding

Neurodevelopmental Effects of Perfluorinated ChemicalsR00ES026729 · NIEHS · YALE UNIVERSITY · PI LIEW, ZEYAN · 2018 to 2020
$742k
Neurodevelopmental effects of Perfluorinated ChemicalsK99ES026729 · NIEHS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI LIEW, ZEYAN · 2017 to 2018
$317k
NIEHS NIH HHS K99 ES026729NIEHS NIH HHS R00 ES026729
6 · The paper itself

Abstract

backgroundPerfluoroalkyl substances (PFASs) are widespread persistent organic compounds that have been suggested to affect neurodevelopment.

objectiveWe aimed to evaluate whether prenatal exposure to PFASs is associated with IQ in children.

methodsWe studied 1,592 pregnancies enrolled in the Danish National Birth Cohort (DNBC) during 1996-2002. Sixteen PFASs were measured in maternal plasma collected in early gestation. Child IQ was assessed at 5 y of age using the Wechsler Primary and Preschool Scales of Intelligence-Revised (WPPSI-R) administered by trained psychologists. Using multivariable linear regression models, we estimated the differences in child IQ scores according to PFAS concentration [per natural-log (ng/mL) unit increase or values categorized in quartiles].

resultsPerfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) were detected in all samples, and five additional PFASs were quantified in >80% of the samples. Overall, we found no strong associations between a natural-log unit increase in each of the seven PFASs we evaluated and child IQ scores. A few positive and negative associations were found in the sex-stratified PFAS quartile analyses, but the patterns were inconsistent.

conclusionOverall, we did not find consistent evidence to suggest prenatal exposure to PFASs to be associated with child IQ scores at 5 y of age in the DNBC. Some of the sex-specific observations warrant further investigation. Additional studies should examine offspring IQ at older ages and assess other functional cognitive and neuropsychiatric measures in addition to intelligence. Postnatal exposures to PFASs and mixture effects for PFASs and PFASs with other environmental pollutants should also be considered in future research. https://doi.org/10.1289/EHP2754.

Indexed as

AdultChild, PreschoolCohort StudiesDenmarkEnvironmental PollutantsFemaleFluorocarbonsHumansIntelligenceMaleMaternal ExposurePregnancyPrenatal Exposure Delayed EffectsWechsler ScalesEnvironmental PollutantsFluorocarbons

Identifiers

PMID29897723
PMCPMC6084884
OpenAlexW2808254518

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.