The Parkinson’s Disease Questionaire-8 (PDQ-8)

Clinical intent

The PDQ-8 is a short-form version, derived from the Parkinson Disease Questionaire-39 [1,2]. It is a self-administered questionnaire, used to measure quality of life in persons with Parkinson’s disease.

Calculation

Each question is scored from 0-4 points and the scores are summed. The summed score is then divided by total possible score and given as a percentage score out of 100.

References

[1] Jenkinson C, Fitzpatrick R, Peto V, Greenhall R, Hyman N. The Parkinson's Disease Questionnaire (PDQ-39): development and validation of a Parkinson's disease summary index score. Age Ageing. 1997 Sep;26(5):353-7. doi: 10.1093/ageing/26.5.353. PMID: 9351479.
[2] Katsarou Z, Bostantjopoulou S, Peto V, Kafantari A, Apostolidou E, Peitsidou E. Assessing quality of life in Parkinson's disease: can a short-form questionnaire be useful? Mov Disord. 2004 Mar;19(3):308-12. doi: 10.1002/mds.10678. PMID: 15022185.