Evidence map›Paper›PMID 32051926›Full record

ArticleEnvironmental epidemiology (Philadelphia, Pa.)2019

Joint and independent neurotoxic effects of early life exposures to a chemical mixture: A multi-pollutant approach combining ensemble learning and g-computation.

Youssef Oulhote, Brent Coull, Marie-Abele Bind, Frodi Debes, Flemming Nielsen, Ibon Tamayo, Pal Weihe, Philippe Grandjean

Open access · goldAbstract read
In one paragraph

Article in Environmental epidemiology (Philadelphia, Pa.), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.4field-weighted citation impact, top 13% 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

20 citing papers in PubMed, 35 citations in OpenAlex.

  1. Article
  2. [Apply the Miettinen Formula to Assess the Health Benefits of the PMSichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition · 2026
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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

8 authors at 3 institutions in 3 countries.

Youssef OulhoteDepartment of Biostatistics and Epidemiology, School of Public Health and Health Sciences, UMASS- Amherst, Amherst, MA, USA.
Brent CoullDepartment of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
Marie-Abele BindDepartment of Statistics, Faculty of Arts and Sciences, Harvard University, Cambridge, MA, USA.
Frodi DebesDepartment of Occupational Medicine and Public Health, Faroese Hospital System, Torshavn, Faroe Islands.
Flemming NielsenInstitute of Public Health, University of Southern Denmark, Odense, Denmark.
Ibon TamayoDepartment of Statistics, Faculty of Arts and Sciences, Harvard University, Cambridge, MA, USA.
Pal WeiheDepartment of Occupational Medicine and Public Health, Faroese Hospital System, Torshavn, Faroe Islands.
Philippe GrandjeanDepartment of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
Harvard University · USUniversity of Southern Denmark · DKUniversity of the Faroe Islands · FO

Funding

Transporting established insights from classical experimental design to address causal questions in environmental epidemiology including the understanding of biological mediating mechanismsDP5OD021412 · OD · MASSACHUSETTS GENERAL HOSPITAL · PI BIND, MARIE-ABELE CATHERINE · 2016 to 2020
$2.1M
Immunotoxicity in Humans with Lifetime Exposure to Ocean PullutantsR01ES021993 · NIEHS · HARVARD SCHOOL OF PUBLIC HEALTH · PI GRANDJEAN, PHILIPPE ADAM · 2012 to 2016
$762k
NIEHS NIH HHS R01 ES021993NIH HHS DP5 OD021412
6 · The paper itself

Abstract

backgroundExposure to mercury (Hg) is associated with adverse developmental effects. However, Hg occurs with a multitude of chemicals. We assessed the associations of developmental exposure to multiple pollutants with children's neurodevelopment using a novel approach.

methodsHg, polychlorinated biphenyls (PCBs), and perfluoroalkyl substances were measured in maternal and children's blood at 5-years (n=449 and 419). At 7-years, children were administered Boston Naming Test (BNT) and the Strengths and Difficulties Questionnaire (SDQ). We used the G-formula combined with SuperLearner to estimate independent and joint effects of chemicals at both ages. We constructed flexible exposure-response relationships and assessed interactions.

resultsMost chemicals showed negative relationships with BNT scores. An inter-quartile range (IQR) increase in maternal Hg and perfluorooctanoic acid (PFOA) was associated with 0.15 standard deviation [SD] (95% Confidence Interval [CI]: -0.29,-0.03) and 0.14 SD (95%CI: -0.26,-0.05) lower scores in BNT, whereas a joint IQR increase in the mixture of chemicals was associated with 0.48 SD (95%CI: -0.69,-0.25) lower scores in BNT. An IQR increase in PFOA was associated with 0.11 SD (95%CI: 0.02,0.26) higher total SDQ difficulties scores. Maternal ∑PCBs concentrations were associated with lower SDQ scores (β=-0.09 SD; 95%CI: -0.19,0), whereas 5-years ∑PCBs showed a negative association (β=-0.09 SD; 95%CI: -0.21,0). Finally, a joint IQR increase in the mixture was associated with 0.22 SD (95%CI: 0.04,0.4) higher SDQ scores.

conclusionsUsing a novel statistical approach, we confirmed associations between prenatal mercury exposure and lower cognitive function. The potential developmental effects of PFASs need additional attention.

Identifiers

PMID32051926
PMCPMC7015154
OpenAlexW2973636901

What OpenQuestion holds

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LicenceCC BY
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.