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Movement Disorder Society‐sponsored revision of the Unified Parkinson's Disease Rating Scale (MDS‐UPDRS): Scale presentation and clinimetric testing results
Author(s) -
Goetz Christopher G.,
Tilley Barbara C.,
Shaftman Stephanie R.,
Stebbins Glenn T.,
Fahn Stanley,
MartinezMartin Pablo,
Poewe Werner,
Sampaio Cristina,
Stern Matthew B.,
Dodel Richard,
Dubois Bruno,
Holloway Robert,
Jankovic Joseph,
Kulisevsky Jaime,
Lang Anthony E.,
Lees Andrew,
Leurgans Sue,
LeWitt Peter A.,
Nyenhuis David,
Olanow C. Warren,
Rascol Olivier,
Schrag Anette,
Teresi Jeanne A.,
van Hilten Jacobus J.,
LaPelle Nancy
Publication year - 2008
Publication title -
movement disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.352
H-Index - 198
eISSN - 1531-8257
pISSN - 0885-3185
DOI - 10.1002/mds.22340
Subject(s) - rating scale , cronbach's alpha , psychology , movement disorders , physical medicine and rehabilitation , physical therapy , parkinson's disease , activities of daily living , psychometrics , disease , medicine , clinical psychology , psychiatry , developmental psychology , pathology
We present a clinimetric assessment of the Movement Disorder Society (MDS)‐sponsored revision of the Unified Parkinson's Disease Rating Scale (MDS‐UPDRS). The MDS‐UDPRS Task Force revised and expanded the UPDRS using recommendations from a published critique. The MDS‐UPDRS has four parts, namely, I: Non‐motor Experiences of Daily Living; II: Motor Experiences of Daily Living; III: Motor Examination; IV: Motor Complications. Twenty questions are completed by the patient/caregiver. Item‐specific instructions and an appendix of complementary additional scales are provided. Movement disorder specialists and study coordinators administered the UPDRS (55 items) and MDS‐UPDRS (65 items) to 877 English speaking (78% non‐Latino Caucasian) patients with Parkinson's disease from 39 sites. We compared the two scales using correlative techniques and factor analysis. The MDS‐UPDRS showed high internal consistency (Cronbach's alpha = 0.79–0.93 across parts) and correlated with the original UPDRS (ρ = 0.96). MDS‐UPDRS across‐part correlations ranged from 0.22 to 0.66. Reliable factor structures for each part were obtained (comparative fit index > 0.90 for each part), which support the use of sum scores for each part in preference to a total score of all parts. The combined clinimetric results of this study support the validity of the MDS‐UPDRS for rating PD. © 2008 Movement Disorder Society