Evidence map›Paper›PMID 23933621›Full record

ArticleJournal of epidemiology2013

Associations of prenatal mercury exposure from maternal fish consumption and polyunsaturated fatty acids with child neurodevelopment: a prospective cohort study in Italy.

Francesca Valent, Marika Mariuz, Maura Bin, D'Anna Little, Darja Mazej, Veronica Tognin, Janja Tratnik, Alison J McAfee, Maria S Mulhern, Maria Parpinel and 4 more

Open access · goldAbstract read
In one paragraph

Article in Journal of epidemiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 6 pooled it
5.0field-weighted citation impact, top 5% 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

40 citing papers in PubMed, 6 syntheses or guidelines pooled it, 106 citations in OpenAlex.

  1. Pooled it
  2. Neurodevelopmental Outcomes Associated with Early-Life Exposure to Heavy Metals: A Systematic Review.International journal of environmental research and public health · 2025
    Pooled it
  3. Pooled it
  4. Prenatal Mercury Exposure and Neurodevelopment up to the Age of 5 Years: A Systematic Review.International journal of environmental research and public health · 2022
    Pooled it
  5. Pooled it
  6. Pooled it
  7. Chronic atrophic gastritis in association with hair mercury level.Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine · 2014
    Trial
  8. Article
  9. Which prenatal biomarker is most appropriate for methylmercury dose-response for neurodevelopmental effects?Journal of toxicology and environmental health. Part B, Critical reviews · 2025
    Review
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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

14 authors at 4 institutions in 3 countries.

Francesca ValentInstitute of Hygiene and Clinical Epidemiology, University Hospital of Udine, Udine, Italy. francesca.valent@uniud.it
Marika Mariuz
Maura Bin
D'Anna Little
Darja Mazej
Veronica Tognin
Janja Tratnik
Alison J McAfee
Maria S Mulhern
Maria Parpinel
Marco Carrozzi
Milena Horvat
Giorgio Tamburlini
Fabio Barbone
University of Udine · ITIRCCS Materno Infantile Burlo Garofolo · ITJožef Stefan Institute · SIUniversity of Ulster · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMercury is a neurotoxin, and limited prenatal exposure to it can affect long-term child neurodevelopment. However, results of epidemiologic studies of such exposure have been inconsistent. We examined the association of prenatal mercury exposure from maternal fish consumption with child neurodevelopment in northern Italy.

methodsA population-based cohort of 606 children and their mothers was studied from pregnancy to age 18 months. Mercury levels were measured in maternal hair and blood during pregnancy and in umbilical cord blood and breast milk. Levels of polyunsaturated fatty acids (PUFAs) were measured in maternal serum. Maternal and child intakes of fish were assessed by using a food frequency questionnaire. The Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III) was used to evaluate child neurodevelopment. Multivariate linear regression was used to examine the association of mercury exposure with BSID-III scores, after controlling for maternal fish intake, PUFAs during pregnancy, and several other confounders.

resultsMean weekly fish intake during pregnancy was less than 2 servings. Mercury concentrations in biological samples were low (mean, 1061 ng/g in hair) and moderately correlated with fish intake, particularly of carnivorous species. Maternal ω-3 PUFA concentrations were poorly correlated with fish intake. Maternal intelligence quotient (IQ) and child intake of fish were significantly associated with neurodevelopment scores. In multivariate models, the level of Hg exposure was not associated with neurodevelopmental performance at 18 months.

conclusionsIn this Italian population, neurodevelopment at 18 months was associated with child intake of fresh fish and maternal IQ rather than with mercury exposure. The expected beneficial effect of maternal fish intake (from maternal ω-3 PUFAs) was not found.

Indexed as

FishesFood ContaminationMaternal Nutritional Physiological PhenomenaPrenatal Exposure Delayed EffectsAdultAnimalsChild DevelopmentDiet SurveysFatty Acids, UnsaturatedFemaleHumansInfantItalyMaleMercuryNervous SystemFatty Acids, UnsaturatedMercury

Identifiers

PMID23933621
PMCPMC3775530
OpenAlexW2074760095

What OpenQuestion holds

Textmetadata
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.