Evidence map›Paper›PMID 32955354›Full record

ArticleEnvironmental health perspectives2020

Exposure to Manganese in Drinking Water during Childhood and Association with Attention-Deficit Hyperactivity Disorder: A Nationwide Cohort Study.

Jörg Schullehner, Malene Thygesen, Søren Munch Kristiansen, Birgitte Hansen, Carsten Bøcker Pedersen, Søren Dalsgaard

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
7.4field-weighted citation impact, top 2% 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

43 citing papers in PubMed, 88 citations in OpenAlex.

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  11. Manganese-Induced Parkinsonism: A Review of Etiologies and Treatments.Degenerative neurological and neuromuscular disease · 2025
    Review
  12. Article
  13. Article
  14. Article
  15. Perspectives on environment and health research in Denmark.Scandinavian journal of public health · 2024
    Article
  16. Article
  17. Article
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  19. Manganese in residential drinking water from a community-initiated case study in Massachusetts.Journal of exposure science & environmental epidemiology · 2024
    Article
  20. 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

6 authors at 2 institutions in 1 country.

Jörg SchullehnerNational Centre for Register-based Research, Aarhus University, Aarhus, Denmark.
Malene ThygesenNational Centre for Register-based Research, Aarhus University, Aarhus, Denmark.
Søren Munch KristiansenDepartment of Geoscience, Aarhus University, Aarhus, Denmark.
Birgitte HansenGeological Survey of Denmark and Greenland, Aarhus, Denmark.
Carsten Bøcker PedersenNational Centre for Register-based Research, Aarhus University, Aarhus, Denmark.
Søren DalsgaardNational Centre for Register-based Research, Aarhus University, Aarhus, Denmark.
Aarhus University · DKGeological Survey of Denmark and Greenland · DK

Funding

Air-pollution risk for Autism and ADHD - cross-disorder insights and genetic liabilityR01ES026993 · NIEHS · UNIVERSITY OF WISCONSIN MILWAUKEE · PI KALKBRENNER, AMY E, SCHENDEL, DIANA · 2017 to 2021
$2.4M
NIEHS NIH HHS R01 ES026993
6 · The paper itself

Abstract

backgroundManganese (Mn) in drinking water may increase the risk of several neurodevelopmental outcomes, including attention-deficit hyperactivity disorder (ADHD). Earlier epidemiological studies on associations between Mn exposure and ADHD-related outcomes had small sample sizes, lacked spatiotemporal exposure assessment, and relied on questionnaire data (not diagnoses)-shortcomings that we address here.

objectiveOur objective was to assess the association between exposure to Mn in drinking water during childhood and later development of ADHD.

methodsIn a nationwide population-based registry study in Denmark, we followed a cohort of 643,401 children born 1992-2007 for clinical diagnoses of ADHD. In subanalyses, we classified cases into ADHD-Inattentive and ADHD-Combined subtypes based on hierarchical categorization of International Classification of Diseases (ICD)-10 codes. We obtained Mn measurements from 82,574 drinking water samples to estimate longitudinal exposure during the first 5 y of life with high spatiotemporal resolution. We modeled exposure as both peak concentration and time-weighted average. We estimated sex-specific hazard ratios (HRs) in Cox proportional hazards models adjusted for age, birth year, socioeconomic status (SES), and urbanicity.

resultsWe found that exposure to increasing levels of Mn in drinking water was associated with an increased risk of ADHD-Inattentive subtype, but not ADHD-Combined subtype. After adjusting for age, birth year, and SES, females exposed to high levels of Mn (i.e., DISCUSSION: Mn in drinking water was associated with ADHD, specifically the ADHD-Inattentive subtype. Our results support earlier studies suggesting a need for a formal health-based drinking water guideline value for Mn. Future Mn-studies should examine ADHD subtype-specific associations and utilize direct subtype measurements rather than relying on ICD-10 codes alone. https://doi.org/10.1289/EHP6391.

Indexed as

Proportional Hazards ModelsAttention Deficit Disorder with HyperactivityChildCohort StudiesDietary ExposureDrinking WaterFemaleHumansMaleManganeseRisk FactorsWater Pollution, ChemicalDrinking WaterManganese

Identifiers

PMID32955354
PMCPMC7505135
OpenAlexW3087018796

What OpenQuestion holds

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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.