Tuesday 19 January 2016

Simplified conversion method for unified Parkinson's disease rating scale motor examinations.

This is useful... especially because both scores seem to still be in widespread use...

Mov Disord. 2015 Dec;30(14):1967-70. doi: 10.1002/mds.26435. Epub 2015 Nov 17.
Hentz JG, Mehta SH, Shill HA, Driver-Dunckley E, Beach TG, Adler CH.


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.

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