Evidence map›Paper›PMID 23419685›Full record

SynthesisNeurotoxicology2013

The neurobehavioral impact of manganese: results and challenges obtained by a meta-analysis of individual participant data.

Monika Meyer-Baron, Michael Schäper, Guido Knapp, Roberto Lucchini, Silvia Zoni, Rita Bast-Pettersen, Dag G Ellingsen, Yngvar Thomassen, Shuchang He, Hong Yuan and 11 more

Open access · greenAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in Neurotoxicology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.9field-weighted citation impact, top 16% 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

23 citing papers in PubMed, 42 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Review
  14. Neurobehavioral performance of patients diagnosed with manganism and idiopathic Parkinson disease.International archives of occupational and environmental health · 2019
    Article
  15. Article
  16. Article
  17. Article
  18. Assessing human metal accumulations in an urban superfund site.Environmental toxicology and pharmacology · 2017
    Article
  19. Article
  20. 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

21 authors at 14 institutions in 8 countries.

Monika Meyer-BaronIfADo, Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany. meyerbaron@ifado.de
Michael Schäper
Guido Knapp
Roberto Lucchini
Silvia Zoni
Rita Bast-Pettersen
Dag G Ellingsen
Yngvar Thomassen
Shuchang He
Hong Yuan
Qiao Niu
Xian-Liang Wang
Yong-Jian Yang
Anders Iregren
Bengt Sjögren
Morten Blond
Peter Laursen
Bo Netterstrom
Donna Mergler
Rosemarie Bowler
Christoph van Thriel
TU Dortmund University · DENational Institute of Occupational Health · NOPeking University · CNAnhui Medical University · CNBispebjerg Hospital · DKChinese Research Academy of Environmental Sciences · CNDanish Working Environment Authority · DKIcahn School of Medicine at Mount Sinai · USKarolinska Institutet · SESan Francisco State University · USShanxi Medical University · CNSjællands Universitetshospital, Nykøbing F. · DKUniversité du Québec à Montréal · CAUniversity of Brescia · IT

Funding

Neurologic function in children exposed to ambient manganeseR01ES019222 · NIEHS · UNIVERSITY OF CALIFORNIA SANTA CRUZ · PI Megan K Horton · 2010 to 2026
$9.1M
NIEHS NIH HHS R01 ES019222
6 · The paper itself

Abstract

Results from a meta-analysis of aggregated data provoked a new analysis using individual data on the neuropsychological performance of occupationally exposed workers. Data from eight studies examining 579 exposed and 433 reference participants were included, 28 performance variables analyzed. The performance scores were adjusted for well-known individual-level covariates; the influence of possible, but unknown study-level covariates was attenuated by means of a z-normalization. Associations between performance and exposure were estimated by ANOVAs and ANCOVAs, the latter representing multi-level models. Four cognitive and motor performance variables each indicated significantly lower performances of exposed individuals when confounding was considered; slowed motor performances and deficits in attention and short-term memory were found. Performance on a single test was significantly related to the biomarker manganese in blood. The outcomes on susceptibility were weak. The slowing of responses was the most distinct feature of performances of exposed workers. It remains unclear, whether this result is related to the employed tests or provides important information about early stages of the neurotoxic impairment. More specific cognitive tests need to be employed to answer this question. The lack of dose-response relationships was related to features of the biomarker: it does not reflect the Mn in brain responsible for changes in performances.

Indexed as

Analysis of VarianceCognition DisordersDatabases, BibliographicHumansManganeseManganese PoisoningNeuropsychological TestsManganese

Identifiers

PMID23419685
PMCPMC4074005
OpenAlexW2027700750

What OpenQuestion holds

Textmetadata
LicenceTDM
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.