title: Simplified conversion method for unified Parkinson's disease rating scale motor examinations.
abstract: 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.
authors.affiliation: Department of Health Sciences Research, Mayo Clinic, Scottsdale, Arizona, USA.
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Hentz
authors.affiliation: Parkinson's Disease and Movement Disorders Center, Mayo Clinic, Scottsdale, Arizona, USA.
authors.forename: Shyamal H
authors.initials: SH
authors.lastname: Mehta
authors.affiliation: University of Arizona College of Medicine, Arizona, USA.
authors.forename: Holly A
authors.initials: HA
authors.lastname: Shill
authors.affiliation: Parkinson's Disease and Movement Disorders Center, Mayo Clinic, Scottsdale, Arizona, USA.
authors.forename: Erika
authors.initials: E
authors.lastname: Driver-Dunckley
authors.affiliation: Civin Laboratory of Neuropathology, Banner Sun Health Research Institute, Sun City, Arizona, USA.
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Beach
authors.affiliation: Parkinson's Disease and Movement Disorders Center, Mayo Clinic, Scottsdale, Arizona, USA.
authors.forename: Charles H
authors.initials: CH
authors.lastname: Adler
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D009460:Neurologic Examination / Q000379:methods*; D010300:Parkinson Disease / Q000175:diagnosis* / Q000503:physiopathology; D012720:Severity of Illness Index
keywords: MDS; Parkinson's; UPDRS; motor; score