ArticleMovement disorders : official journal of the Movement Disorder Society2018
Selection of Normative Group Affects Rates of Mild Cognitive Impairment in Parkinson's Disease.
Article in Movement disorders : official journal of the Movement Disorder Society, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Defining and Measuring Cognitive Decline and Clinical Relevance.Neurology and therapy · 2026Review
- The effect of Apolipoprotein E4 on cognitive function in Parkinson's disease: A structural MRI study in the PPMI cohort.PloS one · 2026Article
- Cognitive Performance in Early Neuronal Synuclein Disease with Hyposmia but without Motor Disability: Association with Dopamine Deficiency and Isolated Rapid Eye Movement Sleep Behavior Disorder.Annals of neurology · 2025Article
- Use of Robust Norming to Create a Sensitive Cognitive Summary Score in De Novo Parkinson's Disease: An Illustrative Example.Movement disorders : official journal of the Movement Disorder Society · 2025Article
- Predicting the occurrence of mild cognitive impairment in Parkinson's disease using structural MRI data.Frontiers in neuroscience · 2024Article
- Characterizing mild cognitive impairment to predict incident dementia in adults with bipolar disorder: What should the benchmark be?The Clinical neuropsychologist · 2023Article
- Different impulse control disorder evolution patterns and white matter microstructural damage in the progression of Parkinson's disease.Frontiers in aging neuroscience · 2023Article
- Time-course of decline in different cognitive domains in Parkinson's disease: a retrospective study.Journal of neural transmission (Vienna, Austria : 1996) · 2022Article
- Prodromal Dementia With Lewy Bodies: Evolution of Symptoms and Predictors of Dementia Onset.Journal of geriatric psychiatry and neurology · 2022Article
- Evolution patterns of probable REM sleep behavior disorder predicts Parkinson's disease progression.NPJ Parkinson's disease · 2022Article
- Asymmetric Dopamine Transporter Loss Affects Cognitive and Motor Progression in Parkinson's Disease.Movement disorders : official journal of the Movement Disorder Society · 2021Article
- TOMM40 '523' poly-T repeat length is a determinant of longitudinal cognitive decline in Parkinson's disease.NPJ Parkinson's disease · 2021Article
- Statistically Defined Parkinson's Disease Executive and Memory Cognitive Phenotypes: Demographic, Behavioral, and Structural Neuroimaging Comparisons.Journal of Parkinson's disease · 2021Article
- Beyond PD-MCI: objectively defined subtle cognitive decline predicts future cognitive and functional changes.Journal of neurology · 2021Article
- The Neuropsychiatry of Parkinson Disease: A Perfect Storm.The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry · 2019Review
- Frontotemporal Lobe Degeneration as Origin of Scans Without Evidence of Dopaminergic Deficit.Frontiers in neurology · 2018Article
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Authors and funding
7 authors.
Funding
Abstract
objectiveThe objective of this study was to examine the impact of different methods of standardizing cognitive data in the Parkinson's Progression Marker Initiative.
methodsCognitive data from 423 participants with Parkinson's disease were included (age = 61.7 [9.7], education = 15.6 [3.0]). Internal norms were calculated using the group mean and standard deviation of the healthy control group. Published norms were compared to the overall group mean of and to age-stratified norms from healthy controls for each neuropsychological test over 4 visits. Rates of mild cognitive impairment were calculated using established criteria.
resultsThe use of internal norms resulted in lower standardized scores than published norms on all tests with the exception of memory and processing speed (P ≤ .001). Individuals were 1.5 to 2.1 times more likely to be diagnosed with mild cognitive impairment using internal norms than published norms.
conclusionsStandardization approaches with cognitive data are not interchangeable. Selection of a normative comparison group impacts research and clinical interpretations of cognitive data. © 2018 International Parkinson and Movement Disorder Society.
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