Evidence map›Paper›PMID 31932629›Full record

ArticleScientific reports2020

Variability of iodine concentrations in the human placenta.

Kristof Y Neven, Cédric B D Marien, Bram G Janssen, Harry A Roels, Nadia Waegeneers, Tim S Nawrot, Ann Ruttens

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 11% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 23 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

7 authors at 5 institutions in 2 countries.

Kristof Y NevenCentre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590, Diepenbeek, Belgium.
Cédric B D MarienSD Chemical and Physical Health Risks, Sciensano, Leuvensesteenweg 17, 3080, Tervuren, Belgium.
Bram G JanssenCentre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590, Diepenbeek, Belgium.
Harry A RoelsCentre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590, Diepenbeek, Belgium.
Nadia WaegeneersSD Chemical and Physical Health Risks, Sciensano, Leuvensesteenweg 17, 3080, Tervuren, Belgium.
Tim S NawrotCentre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590, Diepenbeek, Belgium.
Ann RuttensSD Chemical and Physical Health Risks, Sciensano, Leuvensesteenweg 17, 3080, Tervuren, Belgium. ann.ruttens@sciensano.be.
Hasselt University · BESciensano (Belgium) · BEKU Leuven · BEOmniActive Health Technologies (United States) · USUCLouvain · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Iodine is an essential trace element, necessary for the production of thyroid hormones, which play a key role in optimal foetal growth and (neuro-) development. To date, iodine deficiency remains a health burden in many countries. We investigated the variability of placental iodine concentrations within and between individuals. We used 20 mother-neonate pairs from the ENVIRONAGE birth cohort, took samples at three standardized locations of the placentas, pooled and digested them, and determined the iodine concentrations using an ICP-MS method as an alternative for the Sandell-Kolthoff method. The variability between and within the three sample regions was calculated using the intra-class correlation coefficient (ICC) from the variance components of mixed models. With the Friedman test, the differences between placental biopsies were assessed. The ICC showed a higher between-placenta (68.6%) than within-placenta (31.4%) variability. Subsequently, we used our optimized method to determine iodine concentrations in 498 mother-neonate pairs, which averaged 26.1 μg/kg. For 96 mothers, the urinary iodine concentrations were also determined, which showed no correlation with the placental iodine storage, as was expected. Future studies are necessary to explore the effects of these placental iodine concentrations in relation to health outcomes of mother and child at birth and later in life.

Indexed as

Fetal DevelopmentAdultFemaleHumansInfant, NewbornIodineMalePlacentaPregnancyTissue DistributionIodine

Identifiers

PMID31932629
PMCPMC6957482
OpenAlexW2999856326

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.