Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

OBJECTIVE: The purpose of this study was to evaluate the psychometric properties of a short form health survey, the Parkinson's Disease Questionnaire (PDQ-8), cross-culturally, by comparing results gained from this instrument to the original longer form instrument-the PDQ-39. DESIGN: Data are from the Global Parkinson's Disease Survey. OUTCOMES: The 8-item Parkinson's Disease Questionnaire Single Index Score (PDQ-8-SI). In this study, we evaluate response rate, scaling assumptions, and data quality, in terms of comparability of results with the parent form from which the PDQ-8 was derived, of the instrument in the USA, Canada, Spain, Italy and Japan. RESULTS: The PDQ-8 was found to produce results that were very similar to the parent form across all five countries. However, it should be borne in mind that the PDQ-8 was nested within the PDQ-39, and results may be influenced by this. CONCLUSIONS: Results suggest that the PDQ-8 is a valid and reliable measure that can be appropriately and meaningfully used in cross-cultural studies.

Original publication

DOI

10.1016/j.parkreldis.2006.06.006

Type

Journal article

Journal

Parkinsonism Relat Disord

Publication Date

02/2007

Volume

13

Pages

22 - 28

Keywords

Aged, Canada, Cross-Cultural Comparison, Female, Humans, Italy, Japan, Male, Parkinson Disease, Quality of Life, Spain, Surveys and Questionnaires, United States