title: Movement disorder society unified Parkinson disease rating scale experiences in daily living: longitudinal changes and correlation with other assessments.
abstract: The Movement Disorder Society (MDS) commissioned a revision of the UPDRS with the goals of improving instructions and definitions, more accurately evaluating milder features, and assessing patient-reported outcomes and nonmotor features. To date, no study has evaluated longitudinal changes in components of the MDS-UPDRS over time or correlated these with changes in other scales of various symptoms. We assessed Parts I and II of the MDS-UPDRS (non-Motor and Motor Experiences of Daily Living [nM-EDL, M-EDL]) as well as a number of other scales of motor, cognitive and behavioral function in a large population of patients (n = 383) with early- to mid-stage Parkinson's disease (PD) who had previously participated in a trial of a putative disease-modifying agent. Both parts of a MDS-UPDRS showed significant change over the 3-year follow-up period, with M-EDL scores declining to a greater extent than nM-EDL. Both the scores and their changes over time correlated relatively well with other rating scales of similar disease aspects. Modest correlations with the original version of the UPDRS supported the increased attention to nonmotor symptoms as well as milder levels of severity in the MDS-UPDRS. The M-EDL was much more sensitive to change over time in these early- to mid-stage patients than the original UPDRS Activities of Daily Living (ADL) scale. Finally, we showed no change over time in a small group of individuals with dopamine transporter single-photon emission computed tomography scans without evidence for dopamine deficiency. The nM-EDL and M-EDL components of the MDS-UPDRS provide an effective, relevant measure of change in the broad spectrum of symptoms of PD over the first decade of the disease.
authors.affiliation: Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Anthony E
authors.initials: AE
authors.lastname: Lang
authors.forename: Shirley
authors.initials: S
authors.lastname: Eberly
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Goetz
authors.forename: Glenn
authors.initials: G
authors.lastname: Stebbins
authors.forename: David
authors.initials: D
authors.lastname: Oakes
authors.forename: Ken
authors.initials: K
authors.lastname: Marek
authors.forename: Bernard
authors.initials: B
authors.lastname: Ravina
authors.forename: Caroline M
authors.initials: CM
authors.lastname: Tanner
authors.forename: Ira
authors.initials: I
authors.lastname: Shoulson
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D018450:Disease Progression; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008609:Mental Status Schedule; D008875:Middle Aged; D010300:Parkinson Disease / Q000175:diagnosis* / Q000523:psychology*; D012720:Severity of Illness Index; D012955:Societies, Medical / Q000592:standards*; D013223:Statistics as Topic; D013997:Time Factors
keywords: MDS-UPDRS; Parkinson's disease; disability; rating scales