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J Neurol. 1998 May;245 Suppl 1:S10-4.

PDQ-39: a review of the development, validation and application of a Parkinson's disease quality of life questionnaire and its associated measures.

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Department of Public Health, University of Oxford, UK.


Parkinson's disease is a common degenerative neurological condition. A number of general instruments exist to measure quality of life, but these were not designed to address areas salient to a specific disease. This contribution reviews the development and validation of the PDQ-39, a short 39-item quality of life questionnaire for Parkinson's disease. 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 briefer measure (PDQ-8) derived from the PDQ-39, and of two summary indices (PDQ-39SI and PDQ-8SI.

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