The validity and reliability of a screening questionnaire for Parkinson's disease in a community

Jong Hun Kim, Hae Kwan Cheong, Chong Sik Lee, Sung Eun Yi, Kun Woo Park

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    9 Citations (Scopus)


    Objectives: Parkinson's disease is one of the most common neurodegenerative diseases in the elderly population. In order to estimate the prevalence of Parkinson's disease in the community, the application of a good screening tool is essential. We evaluated the validity and reliability of a Parkinson's disease screening questionnaire and propose an alternative measure to improve its validity for use in community surveys. Methods: We designed the study in a three-phase approach consisting of a screening questionnaire, neurologic examination, and confirmatory examination. A repeated survey was administered to patients with disease detected in the community and on 150 subjects. We examined internal consistency using Cronbach's alpha test, test-retest reliability using the kappa statistic, and validity using sensitivity, specificity, and ROC curves. Unadjusted odds ratios were utilized for the estimation of weights for each questionnaire item. Results: The Cronbach's alpha of the questionnaire was 0.708. The kappa statistic for test-retest reliability was good to generally fair in most of the items. When newly proposed weighting scores were used, the optimum cut-off value was 7/8. When cut-off value was 5/6 for surveying prevalence in a community, the sensitivity was 0.98, and the specificity was 0.61, with simultaneous improvement in reliability. Conclusions: We recommend 5/6 as the ideal cut-off value for the survey of PD prevalence in community. This questionnaire designed for the Korean community could help future epidemiologic studies of PD.

    Original languageEnglish
    Pages (from-to)9-17
    Number of pages9
    JournalJournal of Preventive Medicine and Public Health
    Issue number1
    Publication statusPublished - 2010 Jan


    • Community
    • Parkinson's disease
    • Questionnaire
    • Reliability
    • Screening
    • Validity

    ASJC Scopus subject areas

    • Public Health, Environmental and Occupational Health


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