title: SPES/SCOPA and MDS-UPDRS: formulas for converting scores of two motor scales in Parkinson's disease.
abstract: BACKGROUND
  Motor impairment in Parkinson's disease (PD) can be evaluated with the Short Parkinson's Evaluation Scale/Scales for Outcomes in Parkinson's disease (SPES/SCOPA) and the Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS). The aim of this study was to determine equation models for the conversion of scores from one scale to the other.
  
  
  METHODS
  148 PD patients were evaluated with the SPES/SCOPA-motor and the MDS-UPDRS motor examination. Linear regression was used to develop equation models.
  
  
  RESULTS
  Scores on both scales were highly correlated (r = 0.88). Linear regression revealed the following equation models (explained variance: 78%):
  
  
  CONCLUSIONS
  With the equation models identified in this study, scores from SPES/SCOPA-motor can be converted to scores from MDS-UPDRS motor examination and vice versa.
authors.affiliation: Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands. D.Verbaan@lumc.nl
authors.forename: D
authors.initials: D
authors.lastname: Verbaan
authors.forename: S M
authors.initials: SM
authors.lastname: van Rooden
authors.forename: C P
authors.initials: CP
authors.lastname: Benit
authors.forename: E W
authors.initials: EW
authors.lastname: van Zwet
authors.forename: J
authors.initials: J
authors.lastname: Marinus
authors.forename: J J
authors.initials: JJ
authors.lastname: van Hilten
mesh_terms: D000368:Aged; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009048:Motor Skills / Q000502:physiology*; D009069:Movement Disorders / Q000175:diagnosis / Q000503:physiopathology; D010300:Parkinson Disease / Q000175:diagnosis* / Q000503:physiopathology*; D012720:Severity of Illness Index; D014894:Weights and Measures / Q000592:standards*