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    Prevalence and Subtypes of Mild Cognitive Impairment in Parkinson's Disease.

    246036_246036.pdf (522.1Kb)
    Access Status
    Open access
    Authors
    Lawrence, B.
    Gasson, Natalie
    Loftus, A.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Lawrence, B. and Gasson, N. and Loftus, A. 2016. Prevalence and Subtypes of Mild Cognitive Impairment in Parkinson's Disease. Scientific Reports. 6: Article No 33929.
    Source Title
    Scientific Reports
    DOI
    10.1038/srep33929
    ISSN
    2045-2322
    School
    School of Psychology and Speech Pathology
    Remarks

    This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by/4.0/

    URI
    http://hdl.handle.net/20.500.11937/25849
    Collection
    • Curtin Research Publications
    Abstract

    The current study examined the prevalence and subtypes of Mild Cognitive Impairment (MCI) in an Australian sample of people with Parkinson's Disease (PD). Seventy participants with PD completed neuropsychological assessments of their cognitive performance, using MDS Task Force Level II diagnostic criteria for PD-MCI. A cut-off score of less than one standard deviation (SD) below normative data determined impaired performance on a neuropsychological test. Of 70 participants, 45 (64%) met Level II diagnostic criteria for PD-MCI. Among those with PD-MCI, 42 (93%) were identified as having multiple domain impairment (28 as amnestic multiple domain and 14 as nonamnestic multiple domain). Single domain impairment was less frequent (2 amnestic/1 nonamnestic). Significant differences were found between the PD-MCI and Normal Cognition groups, across all cognitive domains. Multiple domain cognitive impairment was more frequent than single domain impairment in an Australian sample of people with PD. However, PD-MCI is heterogeneous and current prevalence and subtyping statistics may be an artifact of variable application methods of the criteria (e.g., cut off scores and number of tests). Future longitudinal studies refining the criteria will assist with subtyping the progression of PD-MCI, while identifying individuals who may benefit from pharmacological and nonpharmacological interventions.

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