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Unified Parkinson's Disease Rating Scale (UPDRS)
Please visit this webstie for more information about this instrument: International Parkinson Movement Disorder Society

Core for Parkinson's Disease (PD)

Short Description of Instrument

The Unified Parkinson's Disease Rating Scale (UPDRS) has four parts: Part I (non-motor experiences of daily living), Part II (motor experiences of daily living), Part III (motor examination) and Part IV (motor complications).
Part I has two components: IA concerning a number of behaviors that are assessed by the investigator with all pertinent information from patients and caregivers and IB that is completed by the patient with or without the aid of the caregiver, but independently of the investigator.
Part II is designed to be a self-administered questionnaire like Part IB, but can be reviewed by the investigator to ensure completeness and clarity. Of note, the official versions of Part IA, Part IB and Part II of the MDS-UPDRS do not have separate on or off ratings. However, for individual programs or protocols the same questions can be used separately for on and off.
Part III has instructions for the rater to give or demonstrate to the patient; it is completed by the rater.
Part IV integrates patient-derived information with the rater's clinical observations and judgments and is completed by the rater.


Scoring Varies for this instrument.

Comments/Special Instructions


Fahn S, Elton RL, Members of the UPDRS Development Committee. The Unified Parkinson's Disease Rating Scale. In Fahn S, Marsden CD, Calne DB, Goldstein M, eds: Recent Developments in Parkinson's Disease, Vol. 2. Florham Park, NJ: Macmillan Healthcare Information, 1987. pp. 153-163, 293-304.
Goetz, C. G., Nutt, J. G.,& Stebbins, G. T. (2008). The Unified Dyskinesia Rating Scale: presentation and clinimetric profile. Mov Disord, 23(16), 2398-2403. doi: 10.1002/mds.22341
International Parkinson and Movement Disorder Society (2015). MDS Rating Scales. Retrieved 4 March 2015, from


Document last updated July 2019