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    Suitability of the depression, anxiety, and stress scale in Parkinson's disease

    Access Status
    Fulltext not available
    Authors
    Johnson, A.
    Lawrence, B.
    Corti, E.
    Booth, L.
    Gasson, Natalie
    Thomas, M.
    Loftus, Andrea
    Bucks, R.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Johnson, A. and Lawrence, B. and Corti, E. and Booth, L. and Gasson, N. and Thomas, M. and Loftus, A. et al. 2016. Suitability of the depression, anxiety, and stress scale in Parkinson's disease. Journal of Parkinson's Disease. 6 (3): pp. 609-616.
    Source Title
    Journal of Parkinson's Disease
    DOI
    10.3233/JPD-160842
    ISSN
    1877-7171
    School
    School of Psychology and Speech Pathology
    URI
    http://hdl.handle.net/20.500.11937/43664
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 IOS Press and the authors. All rights reserved. Background: The Depression, Anxiety, and Stress Scale 21 (DASS-21) is a frequently used measure of emotional disturbance symptoms in Parkinson s disease (PD). However, the factor structure of the DASS-21 in PD has yet to be explored. Objective: To assess whether the scale is measuring these symptoms in PD in the same way as the general population. Methods: The present study fit a series of established DASS-21 factor structures with both confirmatory factor analysis (CFA) and exploratory structural equation modelling (ESEM) using data from 251 participants with PD. Results: The 3-factor ESEM provided the best fit. The depression and stress scales fit well, however, few items on the anxiety subscale loaded clearly, with several items significantly loading onto the depression or stress factors. Conclusions: Whilst the depression and stress subscales appear suitable in PD, poor loadings and internal consistency indicate the anxiety subscale may not accurately assess anxiety symptomology in PD. This may be due to the scale s reliance on physiological symptoms as indicators of anxiety, when many of these are present in PD. Thus, the anxiety subscale of the DASS-21 may not be a suitable measure of anxiety in PD.

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