The Parkinson’s Disease Quality of Life questionnaire is a self-report instrument
used to assess health-related quality of life in individuals with Parkinson disease
(PD).1 The instrument assesses quality of life across 8 domains: mobility, activities of
daily living, emotional well-being, stigma, social support, cognitive impairment,
communication, and bodily discomfort. There are extensive psychometric data available
for this measure, the majority of which reveal adequate to excellent validity and
reliability for both the 39-item Parkinson’s Disease Questionnaire (PDQ-39) summary
index score and the majority of the 8 domain scores (with the notable exception of
the social support domain).2-4 Domain scores are associated with larger floor and ceiling effects compared with
the PDQ-39 summary index score, suggesting caution in the interpretation of individual
domain scores.1 Responsiveness of the summary index score has been demonstrated with natural disease
progression and with pharmacological interventions with mixed results following rehabilitation
interventions.1 The use of the PDQ-39 is recommended for persons in Hoehn and Yahr stages 1 to 5.
As the time required to administer the PDQ-39 (10–15min) can be long, an abbreviated
8-item version (PDQ-8) was developed.
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Highlights From the Rehabilitation Measures Database
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© 2015 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.