Evidence map›Paper›PMID 33722243›Full record

ArticleEnvironmental health : a global access science source2021

Severity of parkinsonism associated with environmental manganese exposure.

Brad A Racette, Gill Nelson, Wendy W Dlamini, Pradeep Prathibha, Jay R Turner, Mwiza Ushe, Harvey Checkoway, Lianne Sheppard, Susan Searles Nielsen

Open access · goldAbstract read
In one paragraph

Article in Environmental health : a global access science source, 2021. 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
3.6field-weighted citation impact, top 7% 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, 43 citations in OpenAlex.

  1. Article
  2. 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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  7. Update: Protective and risk factors for Parkinson disease.Parkinsonism & related disorders · 2024
    Review
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  12. Associations of ambient manganese exposure with brain gray matter thickness and white matter hyperintensities.Hypertension research : official journal of the Japanese Society of Hypertension · 2023
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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

9 authors at 4 institutions in 3 countries.

Brad A RacetteDepartment of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8111, 63110, St. Louis, Missouri, USA. racetteb@wustl.edu.
Gill NelsonSchool of Public Health, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, 2193, Parktown, South Africa.
Wendy W DlaminiDepartment of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8111, 63110, St. Louis, Missouri, USA.
Pradeep PrathibhaDepartment of Energy, Environmental, and Chemical Engineering, Washington University, Campus Box 1180, One Brookings Drive, 63130, St. Louis, Missouri, USA.
Jay R TurnerDepartment of Energy, Environmental, and Chemical Engineering, Washington University, Campus Box 1180, One Brookings Drive, 63130, St. Louis, Missouri, USA.
Mwiza UsheDepartment of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8111, 63110, St. Louis, Missouri, USA.
Harvey CheckowayDepartment of Family Medicine & Public Health, University of California, 9500 Gilman Drive, # 0725, La Jolla, 92093-0725, San Diego, California, USA.
Lianne SheppardDepartments of Biostatistics and Environmental and Occupational Health Sciences, University of Washington, Box 357232, Washington,, 98195, Seattle, USA.
Susan Searles NielsenDepartment of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8111, 63110, St. Louis, Missouri, USA.
Washington University in St. Louis · USNational Institute for Health Research · GBUniversity of California, San Diego · USUniversity of Washington · US

Funding

Motor and Cognitive Health Outcomes in a Mn-Exposed African CommunityR01ES025991 · NIEHS · WASHINGTON UNIVERSITY · PI RACETTE, BRAD A · 2015 to 2019
$3.7M
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
NIEHS NIH HHS K01 ES028295NIEHS NIH HHS K24 ES017765NIEHS NIH HHS R01 ES025991
6 · The paper itself

Abstract

backgroundExposure to occupational manganese (Mn) is associated with neurotoxic brain injury, manifesting primarily as parkinsonism. The association between environmental Mn exposure and parkinsonism is unclear. To characterize the association between environmental Mn exposure and parkinsonism, we performed population-based sampling of residents older than 40 in Meyerton, South Africa (N = 621) in residential settlements adjacent to a large Mn smelter and in a comparable non-exposed settlement in Ethembalethu, South Africa (N = 95) in 2016-2020.

methodsA movement disorders specialist examined all participants using the Unified Parkinson Disease Rating Scale motor subsection part 3 (UPDRS3). Participants also completed an accelerometry-based kinematic test and a grooved pegboard test. We compared performance on the UPDRS3, grooved pegboard, and the accelerometry-based kinematic test between the settlements using linear regression, adjusting for covariates. We also measured airborne PM

resultsMean PM

conclusionsEnvironmental airborne Mn exposures at levels substantially lower than current occupational exposure thresholds in the United States may be associated with clinical parkinsonism.

Indexed as

AccelerometryAdolescentAdultAgedAir Pollutants, OccupationalBiomechanical PhenomenaChildChild, PreschoolEnvironmental ExposureFemaleHumansInfantInfant, NewbornMaleManganeseMental Status and Dementia TestsAir Pollutants, OccupationalManganeseParticulate MatterCase control studiesManganeseParkinson diseaseParkinsonism

Identifiers

PMID33722243
PMCPMC7962371
OpenAlexW3139057046

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.