PDQ-39 - A REVIEW OF THE DEVELOPMENT, VALIDATION AND APPLICATION OF APARKINSONS-DISEASE QUALITY-OF-LIFE QUESTIONNAIRE AND ITS ASSOCIATED MEASURES

Parkinson's disease is a common degenerative neurological condition. A number of general instruments exist to measure quality of life, but t hese were not designed to address areas salient to a specific disease. This contribution reviews the development and validation of the PDQ-3 9, a short 39-item quality of life questionnaire for Parkinson's disea se. PDQ-39 data can be presented either in profile form or as a single index. This report also reviews the development and validation of a b riefer measure (PDQ-8) derived from the PDQ-39, and of Mo summary indi ces (PDQ-39SI and PDQ-8SI).