Evidence map›Paper›PMID 30934897›Full record

ArticleNutrients2019

Maternal and Early Life Iron Intake and Risk of Childhood Type 1 Diabetes: A Danish Case-Cohort Study.

Steffen Ullitz Thorsen, Thorhallur I Halldorsson, Anne A Bjerregaard, Sjurdur F Olsen, Jannet Svensson

Open access · goldAbstract read
In one paragraph

Article in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 2 pooled it
1.4field-weighted citation impact, top 17% 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

7 citing papers in PubMed, 2 syntheses or guidelines pooled it, 22 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Article
  7. Review
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

5 authors at 2 institutions in 2 countries.

Steffen Ullitz ThorsenCopenhagen Diabetes Research Center (CPH-DIRECT), Department of Paediatrics, Herlev Hospital, University of Copenhagen, Herlev Ringvej 75, 2730 Herlev, Denmark. s.u.thorsen@gmail.com.ORCID 0000-0003-4783-2931
Thorhallur I HalldorssonCentre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, 2300 Copenhagen S, Denmark. LUR@ssi.dk.
Anne A BjerregaardCentre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, 2300 Copenhagen S, Denmark. ANNE@ssi.dk.ORCID 0000-0002-0628-5292
Sjurdur F OlsenCentre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, 2300 Copenhagen S, Denmark. SFO@ssi.dk.
Jannet SvenssonCopenhagen Diabetes Research Center (CPH-DIRECT), Department of Paediatrics, Herlev Hospital, University of Copenhagen, Herlev Ringvej 75, 2730 Herlev, Denmark. Jannet.Svensson@regionh.dk.ORCID 0000-0002-9365-0728
Statens Serum Institut · DKUniversity of Copenhagen · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIron overload has been associated with diabetes. Studies on iron exposure during pregnancy and in early life and risk of childhood type 1 diabetes (T1D) are sparse. We investigated whether iron supplementation during pregnancy and early in life were associated with risk of childhood T1D.

methodsIn a case-cohort design, we identified up to 257 children with T1D (prevalence 0.37%) from the Danish National Birth Cohort through linkage with the Danish Childhood Diabetes Register. The primary exposure was maternal pure iron supplementation (yes/no) during pregnancy as reported in interview two at 30 weeks of gestation (

resultsMaternal iron supplementation was not associated with later risk of T1D in the offspring HR 1.05 (95% CI: 0.76⁻1.45). Offspring intake of iron droplets during the first 18 months of life was inversely associated with risk of T1D HR 0.74 (95% CI: 0.55⁻1.00) (p

conclusionsOur large-scale prospective study demonstrated no harmful effects of iron supplementation during pregnancy and in early life in regard to later risk of childhood T1D in the offspring.

Indexed as

AdolescentAdultCase-Control StudiesChildChild, PreschoolCohort StudiesDenmarkDiabetes Mellitus, Type 1Dietary SupplementsDose-Response Relationship, DrugFemaleHumansInfantInfant, NewbornInfant Nutrition DisordersIronIrondiabetes mellitusfetal programminginfantironnewbornpregnancytype 1

Identifiers

PMID30934897
PMCPMC6521102
OpenAlexW2923853033

What OpenQuestion holds

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Read underepoch 390

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.