The Parkinson’s Disease Questionnaire (PDQ-39) was developed in the 1990’s by a group of researchers the University of Oxford and the Radcliffe Infirmary, Oxford.  The PDQ-39 represents one of the first measures of the impact of Parkinson’s on the patient, to be filled out by the individual patient. It is therefore a self-report measure demonstrating how the individual with Parkinson’s perceives their symptoms and the effect of these symptoms on their quality of life.^1,2 

The PDQ-39 asks 39 questions broken down into 8 measures of quality of life – mobility, activities of daily living, emotional well-being, stigma, social support, cognition, communication, and bodily discomfort. By design, ............