Evidence map›Paper›PMID 23924577›Full record

ArticleAmerican journal of epidemiology2013

Invited commentary: Maternal plasma polybrominated diphenyl ethers and thyroid hormones--challenges and opportunities.

Jonathan Chevrier

Open access · bronzeAbstract readComment
In one paragraph

Article in American journal of epidemiology, 2013. 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
3.1field-weighted citation impact, top 10% 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, 40 citations in OpenAlex.

  1. Polybrominated diphenyl ethers and gestational weight gain: a multi-center prospective cohort study.BJOG : an international journal of obstetrics and gynaecology · 2024
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

1 author at 1 institution in 1 country.

Jonathan ChevrierCenter for Environmental Research and Children's Health, School of Public Health, University of California-Berkeley, 1995 University Avenue, Berkeley, CA 94720-7392, USA. chevrier@berkeley.edu
Center for Environmental Health · US

Funding

Project C: Epigenetic Effects of DDT/E and PBDEs on PubertyP01ES009605 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI ESKENAZI, BRENDA · 1999 to 2015
$11.2M
DDT & PBDE exposure, puberty onset and neurodevelopment in Mexican-American girlsR01ES017054 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI ESKENAZI, BRENDA · 2009 to 2013
$3.2M
PBDEs, DDT and Neurodevelopment in School-Aged Mexican-American ChildrenR01ES015572 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI ESKENAZI, BRENDA · 2007 to 2010
$2.0M
NIEHS NIH HHS P01 ES009605NIEHS NIH HHS R01 ES015572NIEHS NIH HHS R01 ES017054
6 · The paper itself

Abstract

Thyroid hormones play a fundamental role in fetal and child development. While iodine deficiency-related maternal and child hypothyroidism may cause severe mental retardation, recent evidence suggests that milder forms of maternal hypothyroidism and hypothyroxinemia during pregnancy are also associated with altered neurodevelopment. On the other hand, hyperthyroidism during pregnancy has been associated with adverse fetal outcomes. Findings published by Abdelouahab et al. in the American Journal of Epidemiology (Am J Epidemiol. 2013;178(5):701-713) suggest that plasma concentrations of maternal polybrominated diphenyl ethers (PBDEs), which were used as flame retardants until recently and are detected in the tissues of virtually every North American, are associated with umbilical cord and maternal thyroid hormone levels during pregnancy. Although PBDEs have been consistently shown to reduce levels of free and total thyroxine in experimental animal studies, the direction of associations in human studies has been inconsistent. In this commentary, I discuss challenges beyond the factors often cited in the epidemiologic literature to explain inconsistent findings which more specifically apply to the study of PBDEs and thyroid hormones. These include the determination of iodine intake status, the method used to adjust for blood lipid concentrations, the measurement of free thyroid hormone levels, the possible effect of PBDE metabolites, and the potential for reverse causality.

Indexed as

Maternal ExposureFemaleFetal BloodHalogenated Diphenyl EthersHumansPolychlorinated BiphenylsPregnancyPregnancy Trimester, FirstThyroid HormonesHalogenated Diphenyl EthersPolychlorinated BiphenylsThyroid Hormonesflame retardantspolybrominated diphenyl etherspregnancythyroid hormones

Identifiers

PMID23924577
PMCPMC3817455
OpenAlexW2125723274

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.