Evidence map›Paper›PMID 32745994›Full record

ArticleNeuroImage. Clinical2020

Cognitive and motor correlates of grey and white matter pathology in Parkinson's disease.

Mahsa Dadar, Myrlene Gee, Ashfaq Shuaib, Simon Duchesne, Richard Camicioli

Open access · goldAbstract read
In one paragraph

Article in NeuroImage. Clinical, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 2 pooled it
3.2field-weighted citation impact, top 6% 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

18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 48 citations in OpenAlex.

  1. Pooled it
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  5. Racial and ethnic differences in white matter hypointensities: The role of vascular risk factors.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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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

5 authors at 3 institutions in 1 country.

Mahsa DadarDepartment of Radiology and Nuclear Medicine, Faculty of Medicine, Laval University, Canada. Electronic address: mahsa.dadar.1@ulaval.ca.
Myrlene GeeDepartment of Medicine, Division of Neurology, University of Alberta, Canada. Electronic address: myrlene@ualberta.ca.
Ashfaq ShuaibDepartment of Medicine, Division of Neurology, University of Alberta, Canada. Electronic address: shuaib@ualberta.ca.
Simon DuchesneDepartment of Radiology and Nuclear Medicine, Faculty of Medicine, Laval University, Canada. Electronic address: simon.duchesne@fmed.ulaval.ca.
Richard CamicioliDepartment of Medicine, Division of Neurology, University of Alberta, Canada. Electronic address: rcamicio@ualberta.ca.
University of Alberta · CADalsa Corporation · CAUniversité Laval · CA

Funding

CIHR MOP 67132
6 · The paper itself

Abstract

introductionPrevious studies have found associations between grey matter atrophy and white matter hyperintensities (WMH) of vascular origin with cognitive and motor deficits in Parkinson's disease (PD). Here we investigate these relationships in a sample of PD patients and age-matched healthy controls.

methodsData included 50 PD patients and 45 age-matched controls with T1-weighted and FLAIR scans at baseline, 18-months, and 36-months follow-up. Deformation-based morphometry was used to measure grey matter atrophy. SNIPE (Scoring by Nonlocal Image Patch Estimator) was used to measure Alzheimer's disease-like textural patterns in the hippocampi. WMHs were segmented using T1-weighted and FLAIR images. The relationship between MRI features and clinical scores was assessed using mixed-effects models. The motor subscore of the Unified Parkinson's Disease Rating Scale (UPDRSIII), number of steps in a walking trial, and Dementia Rating Scale (DRS) were used respectively as measures of motor function, gait, and cognition.

resultsSubstantia nigra atrophy was significantly associated with motor deficits, with a greater impact in PDs (p < 0.05). Hippocampal SNIPE scores were associated with cognitve decline in both PD and controls (p < 0.01). WMH burden was significantly associated with cognitive decline and increased motor deficits in the PD group, and gait deficits in both PD and controls (p < 0.03).

conclusionWhile substantia nigra atrophy and WMH burden were significantly associated with additional motor deficits, WMH burden and hippocampal atrophy were associated with cognitive deficits in PD patients. These results suggest an additive contribution of both grey and white matter damage to the motor and cognitive deficits in PD.

Indexed as

Cognitive DysfunctionParkinson DiseaseWhite MatterAtrophyCognitionHumansInfantMagnetic Resonance ImagingDeformation based morphometryGrey matter atrophyParkinson’s diseaseScoring by Nonlocal Image Patch EstimatorWhite matter hyperintensities

Identifiers

PMID32745994
PMCPMC7399172
OpenAlexW3042486483

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.