Evidence map›Paper›PMID 29670220›Full record

ArticleJournal of exposure science & environmental epidemiology2018

Blood total mercury and methylmercury among pregnant mothers in Charleston, South Carolina, USA.

Alexis Donohue, Carol L Wagner, James B Burch, Sarah E Rothenberg

Abstract read
In one paragraph

Article in Journal of exposure science & environmental epidemiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
–field-weighted citation impact
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

10 citing papers in PubMed.

  1. Article
  2. Article
  3. Transport and Toxicity of Methylmercury-Cysteine in Cultured BeWo Cells.International journal of molecular sciences · 2021
    Article
  4. Review
  5. Total blood mercury and its determinants in New Zealand children and adults.Journal of exposure science & environmental epidemiology · 2021
    Article
  6. Article
  7. Leaf ethanolic extract ofToxicological research · 2020
    Article
  8. Article
  9. Article
  10. Article
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

4 authors.

Alexis DonohueDepartment of Environmental Health Sciences, University of South Carolina, Columbia, SC, USA.
Carol L WagnerDepartment of Pediatrics, Division of Neonatology, Medical University of South Carolina, Charleston, SC, USA.
James B BurchDepartment of Epidemiology and Biostatistics, University of South Carolina, Columbia, SC, USA.
Sarah E RothenbergDepartment of Environmental Health Sciences, University of South Carolina, Columbia, SC, USA. sarah.rothenberg@oregonstate.edu.

Funding

Methylmercury Exposure Through Rice Ingestion, Gut Microbes, and Offspring DevelopmentR21ES026412 · NIEHS · UNIVERSITY OF SOUTH CAROLINA AT COLUMBIA · PI ROTHENBERG, SARAH E · 2016 to 2017
$387k
NIEHS NIH HHS L30 ES023165NIEHS NIH HHS R21 ES026412
6 · The paper itself

Abstract

backgroundMaternal blood total mercury (THg) is a biomarker for prenatal methylmercury (MeHg) exposure. Few studies have quantified both blood THg and MeHg during pregnancy, and few studies have reported longitudinal trends.

objectivesWe analyzed blood THg and MeHg in a cohort of pregnant mothers in Charleston, South Carolina (n = 83), and investigated whether blood THg or MeHg changed between early and late gestation.

methodsTHg and MeHg were analyzed in blood samples from early (12 ± 1.7 weeks) and late (35 ± 2.2 weeks) gestation.

resultsBlood %MeHg (of THg) averaged 63% (range: 10-114%) and 61% (range: 12-117%) during early and late gestation, respectively. In unadjusted analyses, blood MeHg decreased from early to late pregnancy (paired t-test, p = 0.04), while THg did not change (paired t-test, p = 0.34). When blood MeHg was normalized by the hematocrit, this decrease was no longer statistically significant (paired t-test, p = 0.09).

conclusionsIn unadjusted analyses, blood MeHg, but not THg, decreased significantly between early and late gestation; this decrease was due in part to hemodilution. Percent MeHg (of THg) varied by up to one order of magnitude. Results highlight the importance of Hg speciation in maternal blood samples to assess prenatal MeHg exposure.

Indexed as

AdolescentAdultBiomarkersCohort StudiesEnvironmental ExposureFemaleGestational AgeHospitals, UniversityHumansMercuryMethylmercury CompoundsMiddle AgedMothersNutrition SurveysPregnancyPregnant PeopleBiomarkersMercuryMethylmercury CompoundsHemodilutionMethylmercuryPrenatalSpeciation

Identifiers

PMID29670220
PMCPMC7425126

What OpenQuestion holds

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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.