Evidence map›Paper›PMID 31647574›Full record

ArticleAmerican journal of industrial medicine2020

Manganese exposure, parkinsonian signs, and quality of life in South African mine workers.

Wendy W Dlamini, Gill Nelson, Susan Searles Nielsen, Brad A Racette

Open access · greenAbstract read
In one paragraph

Article in American journal of industrial medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
3.1field-weighted citation impact, top 8% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Utilizing T1-weighted MRI intensity indices to evaluate in-vivo neurotoxicity in a South African cohort with environmental manganese exposure.Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2025
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  19. Severity of parkinsonism associated with environmental manganese exposure.Environmental health : a global access science source · 2021
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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

4 authors at 3 institutions in 3 countries.

Wendy W DlaminiOccupational Health Division, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa.
Gill NelsonOccupational Health Division, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa.
Susan Searles NielsenDepartment of Neurology, Washington University School of Medicine, St Louis, Missouri.
Brad A RacetteOccupational Health Division, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa.ORCID 0000-0002-9582-8235
University of the Witwatersrand · ZAThe George Institute for Global Health · GBWashington University in St. Louis · US

Funding

Manganese-Induced Neurotoxic Effects Research in South Africa (MINERS)R01ES026891 · NIEHS · WASHINGTON UNIVERSITY · PI RACETTE, BRAD A · 2017 to 2021
$3.3M
Epidemiology and Biomarkers of Parkinsonism in WeldersK24ES017765 · NIEHS · WASHINGTON UNIVERSITY · PI RACETTE, BRAD A · 2009 to 2018
$1.5M
A Nationwide Study of Environmental Risk Factors for Parkinson DiseaseK01ES028295 · NIEHS · WASHINGTON UNIVERSITY · PI SEARLES NIELSEN, SUSAN · 2018 to 2020
$450k
NEUROPATHOLOGY OF CHRONIC MANGANESE EXPOSURER21ES017504 · NIEHS · WASHINGTON UNIVERSITY · PI RACETTE, BRAD A · 2009 to 2010
$411k
American Parkinson Disease AssociationAssociation of Commonwealth UniversitiesNIEHS NIH HHS K01 ES028295NIEHS NIH HHS K24 ES017765NIEHS NIH HHS R01 ES026891NIEHS NIH HHS R21ES01750NIEHS NIH HHS R21 ES017504
6 · The paper itself

Abstract

backgroundManganese (Mn) neurotoxicity is associated with parkinsonism; the associated motor deficits can affect individuals' quality of life (QoL). We investigated associations between Mn exposure, parkinsonian signs, and QoL in Mn mine workers.

methodsWe assessed parkinsonian signs and QoL in 187 black South African Mn mine workers, using the Unified Parkinson Disease Rating Scale motor subsection 3 (UPDRS3) and the Parkinson Disease Questionnaire (PDQ-39), respectively. We estimated cumulative Mn exposure in mg Mn/m

resultsParticipants' mean age was 41.8 years (range, 21-67 years); 97.3% were male. Estimated mean cumulative Mn exposure at the time of examination was 5.4 mg Mn/m

conclusionIn this cohort of employed Mn mine workers, parkinsonian signs were common and were associated with both estimated cumulative Mn exposure and poorer QoL.

Indexed as

Quality of LifeAdultAgedCross-Sectional StudiesFemaleHumansMaleManganeseMiddle AgedMinersOccupational DiseasesOccupational ExposureParkinsonian DisordersSouth AfricaSurveys and QuestionnairesManganesemanganeseminersparkinsonian disorders

Identifiers

PMID31647574
PMCPMC8635070
OpenAlexW2982187046

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.