Evidence map›Paper›PMID 26096339›Full record

ArticleMovement disorders : official journal of the Movement Disorder Society2015

Educational attainment and motor burden in Parkinson's disease.

Vikas Kotagal, Nicolaas I Bohnen, Martijn L T M Müller, Robert A Koeppe, Kirk A Frey, Kenneth M Langa, Roger L Albin

Abstract read
In one paragraph

Article in Movement disorders : official journal of the Movement Disorder Society, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

29 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Review
  5. Influence of the level of education on cognitive function in Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2026
    Article
  6. Article
  7. Article
  8. Protective Effects of Genetic Proxies of Cognitive Reserve in Parkinson's Disease: A Longitudinal Multi-Cohort Study.Movement disorders : official journal of the Movement Disorder Society · 2025
    Article
  9. Disparities in Huntington's disease care and research.Current opinion in neurology · 2025
    Review
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  11. Article
  12. Article
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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

7 authors.

Vikas KotagalDepartment of Neurology, University of Michigan, Ann Arbor, Michigan, USAI.
Nicolaas I BohnenDepartment of Neurology, University of Michigan, Ann Arbor, Michigan, USAI.
Martijn L T M MüllerDepartment of Radiology, Division of Nuclear Medicine, University of Michigan, Ann Arbor, Michigan, USA.
Robert A KoeppeDepartment of Radiology, Division of Nuclear Medicine, University of Michigan, Ann Arbor, Michigan, USA.
Kirk A FreyDepartment of Neurology, University of Michigan, Ann Arbor, Michigan, USAI.
Kenneth M LangaDepartment of Internal Medicine and VA Ann Arbor Center for Clinical Management Research, University of Michigan, Ann Arbor, Michigan, USA.
Roger L AlbinDepartment of Neurology, University of Michigan, Ann Arbor, Michigan, USAI.

Funding

Research Education CoreP30AG024824 · NIA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI Neil Alexander · 2004 to 2026
$29.2M
Tomography and Data AnalysisP01NS015655 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI KOEPPE, ROBERT A · 1985 to 2012
$13.0M
Public Outreach and Education CoreP50NS091856 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI ALBIN, ROGER L · 2014 to 2019
$10.1M
NIA NIH HHS P30 AG024824NINDS NIH HHS P01 NS015655NINDS NIH HHS P50 NS091856
6 · The paper itself

Abstract

objectiveGreater educational attainment is a protective factor for neurodegenerative dementias. If education earlier in life leads to greater cerebral reserve, it may play a similar protective role in Parkinson's disease (PD).

methodsWe conducted a cross-sectional clinical imaging study of 142 subjects with PD. All subjects underwent [(11)C]dihydrotetrabenazine PET to confirm nigrostriatal dopaminergic denervation and brain MRI to estimate adjusted cortical gray matter volume (GMV).

resultsAfter adjusting for possible confounders, including cognitive and dopaminergic covariates, as well as nonspecific neurodegeneration covariates (age, disease duration, and total adjusted cortical GMV), lower years of education remained a significant predictor of higher total MDS-UPDRS motor score (t = -3.28; P = 0.001). Education level associated inversely with white matter (WM) hyperintensities in a post-hoc analysis (n = 83).

conclusionsHigher educational attainment is associated with lower severity of motor impairment in PD. This association may reflect an extranigral protective effect upon WM integrity.

Indexed as

Severity of Illness IndexAgedCross-Sectional StudiesEducational StatusFemaleGray MatterHumansMagnetic Resonance ImagingMaleMiddle AgedParkinson DiseasePositron-Emission TomographyProtective FactorsWhite Matterdopamineeducationgray matterneuroprotectionParkinson's disease

Identifiers

PMID26096339
PMCPMC4504749

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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.