Evidence map›Paper›PMID 33330939›Full record

ArticleThe American journal of clinical nutrition2021

Associations of prenatal methylmercury exposure and maternal polyunsaturated fatty acid status with neurodevelopmental outcomes at 7 years of age: results from the Seychelles Child Development Study Nutrition Cohort 2.

J J Strain, Tanzy M Love, Alison J Yeates, Daniel Weller, Maria S Mulhern, Emeir M McSorley, Sally W Thurston, Gene E Watson, Daniel Mruzek, Karin Broberg and 6 more

Open access · greenAbstract read
In one paragraph

Article in The American journal of clinical nutrition, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

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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

16 authors at 4 institutions in 4 countries.

J J StrainNutrition Innovation Centre for Food & Health, Ulster University, Coleraine, Northern Ireland, United Kingdom.
Tanzy M LoveSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Alison J YeatesNutrition Innovation Centre for Food & Health, Ulster University, Coleraine, Northern Ireland, United Kingdom.
Daniel WellerSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Maria S MulhernNutrition Innovation Centre for Food & Health, Ulster University, Coleraine, Northern Ireland, United Kingdom.
Emeir M McSorleyNutrition Innovation Centre for Food & Health, Ulster University, Coleraine, Northern Ireland, United Kingdom.
Sally W ThurstonSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Gene E WatsonSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Daniel MruzekSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Karin BrobergUnit of Metals and Health, Institute of Environmental Medicine, Metals and Health, Karolinska Institute, Stockholm, Sweden.
Matthew D RandSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Juliette HendersonMinistry of Health, Victoria, Mahé, Republic of Seychelles.
Conrad F ShamlayeMinistry of Health, Victoria, Mahé, Republic of Seychelles.
Gary J MyersSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Philip W DavidsonSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Edwin van WijngaardenSchool of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
University of Rochester · USUniversity of Ulster · GBMinistry of Health · SCKarolinska Institutet · SE

Funding

VISUAL INDICES OF NEUROTOXICITYP30ES001247 · NIEHS · UNIVERSITY OF ROCHESTER · PI Martha Susiarjo · 1985 to 2026
$42.8M
TOXICITY OF METHYL MERCURY IN A FISH EATING POPULATIONR01ES010219 · NIEHS · UNIVERSITY OF ROCHESTER · PI VAN WIJNGAARDEN, EDWIN · 2000 to 2019
$11.8M
TRAINING IN ENVIRONMENTAL HEALTH SCIENCES BIOSTATISTICST32ES007271 · NIEHS · UNIVERSITY OF ROCHESTER · PI Sally W Thurston · 1992 to 2026
$3.9M
NIEHS NIH HHS P30 ES001247NIEHS NIH HHS R01 ES010219NIEHS NIH HHS T32 ES007271
6 · The paper itself

Abstract

backgroundFish is a primary source of protein and n-3 PUFA but also contains methylmercury (MeHg), a naturally occurring neurotoxicant to which, at sufficient exposure levels, the developing fetal brain is particularly sensitive.

objectivesTo examine the association between prenatal MeHg and maternal status of n-3 and n-6 PUFA with neurodevelopment, and to determine whether PUFA might modify prenatal MeHg associations with neurodevelopment.

methodsWe examined the Seychelles Child Development Study Nutrition Cohort 2 (NC2) at age 7 y. We used a sophisticated and extensive neurodevelopmental test battery that addressed 17 specific outcomes in multiple neurodevelopmental domains: cognition, executive and psychomotor function, language development, behavior, scholastic achievement, and social communication. Analyses were undertaken on 1237 mother-child pairs with complete covariate data (after exclusions) and a measure of at least 1 outcome. We examined the main and interactive associations of prenatal MeHg exposure (measured as maternal hair mercury) and prenatal PUFA status (measured in maternal serum at 28 weeks' gestation) on child neurodevelopmental outcomes using linear regression models. We applied the Bonferroni correction to account for multiple comparisons and considered P values <0.0029 to be statistically significant.

resultsPrenatal MeHg exposure and maternal DHA and arachidonic acid (20:4n-6) (AA) status were not significantly associated with any neurodevelopmental outcomes. Findings for 4 outcomes encompassing executive function, cognition, and linguistic skills suggested better performance with an increasing maternal n-6:n-3 PUFA ratio (P values ranging from 0.004 to 0.05), but none of these associations were significant after adjusting for multiple comparisons. No significant interaction between MeHg exposure and PUFA status was present.

conclusionsOur findings do not support an association between prenatal MeHg exposure or maternal DHA and AA status with neurodevelopmental outcomes at age 7 y. The roles of n-6 and n-3 PUFA in child neurodevelopment need further research.

Indexed as

Prenatal Exposure Delayed EffectsBiomarkersChildChild DevelopmentFatty Acids, UnsaturatedFemaleHairHumansMethylmercury CompoundsNeurodevelopmental DisordersPregnancySeychellesBiomarkersFatty Acids, UnsaturatedMethylmercury Compoundschild neurodevelopmentmaternal fish consumptionn-6:n-3 ratiopolyunsaturated fatty acidsprenatal methylmercury

Identifiers

PMID33330939
PMCPMC7851824
OpenAlexW3097731347

What OpenQuestion holds

Textmetadata
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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.