Evidence map›Paper›PMID 32284961›Full record

ArticleNPJ Parkinson's disease2020

Sex specific cognitive differences in Parkinson disease.

Tyler Harrison Reekes, Christopher Ian Higginson, Christina Raye Ledbetter, Niroshan Sathivadivel, Richard Matthew Zweig, Elizabeth Ann Disbrow

Open access · goldAbstract read
In one paragraph

Article in NPJ Parkinson's disease, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed, 1 pooled it
8.7field-weighted citation impact, top 1% 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

66 citing papers in PubMed, 1 synthesis or guideline pooled it, 123 citations in OpenAlex.

  1. Pooled it
  2. Orthostatic hypotension and acute cognitive dysfunction in Parkinson's disease: insights from functional near-infrared spectroscopy.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Differentiating between the impact of sex and gender in Parkinson's disease: utilising these to advance current understanding and care practices.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
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  15. Article
  16. Article
  17. Article
  18. Association ofAlpha psychiatry · 2025
    Article
  19. Article
  20. Article

6 more citing papers are in PubMed but not listed here.

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.

Tyler Harrison Reekes1Department of Pharmacology, Toxicology, and Neuroscience, Louisiana State University Health Sciences Center, Shreveport, LA USA.
Christopher Ian Higginson3Department of Psychology, Loyola University of Maryland, Baltimore, MD USA.ORCID 0000-0002-7100-8654
Christina Raye Ledbetter2LSU Health Shreveport Center for Brain Health, Shreveport, LA USA.
Niroshan Sathivadivel2LSU Health Shreveport Center for Brain Health, Shreveport, LA USA.
Richard Matthew Zweig5Department of Neurology, Louisiana State University Health Sciences Center, Shreveport, LA USA.
Elizabeth Ann Disbrow1Department of Pharmacology, Toxicology, and Neuroscience, Louisiana State University Health Sciences Center, Shreveport, LA USA.
Louisiana State University Health Sciences Center Shreveport · USUniversity of Maryland, Baltimore · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Parkinson disease (PD) is a progressive neurodegenerative disorder that is 1.5 times more common in males than in females. While motor progression tends to be more aggressive in males, little is known about sex difference in cognitive progression. We tested the hypothesis that there are sex differences in cognitive dysfunction in non-demented PD. We evaluated 84 participants (38 females) with PD and 59 controls (27 females) for demographic variables and cognitive function, including attention, working memory, executive function, and processing speed. Multivariate ANOVA revealed no significant differences between groups for demographic variables, including age, years of education, global cogntition, daytime sleepiness, predicted premorbid IQ, UPDRS score, PD phenotype, or disease duration. For cognitive variables, we found poorer performance in males versus females with PD for measures of executive function and processing speed, but no difference between male and female controls. Specifically, PD males showed greater deficits in Verbal Fluency (category fluency, category switching, and category switching accuracy), Color Word Interference (inhibition), and speed of processing (SDMT). There were no differences in measures of working memory or attention across sex and inconsistent findings for switching. Our data indicate that males with PD have significantly greater executive and processing speed impairments compared to females despite no differences in demographic variables or other measures of disease severity. Our findings are consistent with the steeper slope of disease progression reported in males with PD.

Indexed as

Neurological manifestationsParkinson's disease

Identifiers

PMID32284961
PMCPMC7142103
OpenAlexW3015479037

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.