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Simplified conversion method for unified Parkinson's disease rating scale motor examinations
Author(s) -
Hentz Joseph G.,
Mehta Shyamal H.,
Shill Holly A.,
DriverDunckley Erika,
Beach Thomas G.,
Adler Charles H.
Publication year - 2015
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.26435
Subject(s) - intraclass correlation , rating scale , parkinson's disease , correlation , physical therapy , movement disorders , psychology , physical medicine and rehabilitation , medicine , psychometrics , disease , mathematics , clinical psychology , developmental psychology , geometry
Background We evaluated a simplified method for converting Unified Parkinson's Disease Rating Scale Part III Motor Examination total scores (UPDRS III) to the International Parkinson and Movement Disorder Society's (MDS) revised version of the scores. Methods PD patients in the Arizona Study of Aging and Neurodegenerative Disorders were assessed with both scales. The accuracy of the predicted scores was assessed using regression modeling, classical intraclass correlation coefficients, and the Bland‐Altman method. Results There was strong correlation between the two scores. Adding 7 points to a UPDRS III total score performed approximately as well as previously published conversion formulas (intraclass correlation: 0.96). The adjusted score is expected to be within 3 points of the MDS‐UPDRS III score 50% of the time and within 9 points 95% of the time. Conclusions Simply adding 7 points to a UPDRS III total score provides a good approximation of the MDS‐UPDRS III total score. © 2015 International Parkinson and Movement Disorder Society