title: Testing functional performance in people with Parkinson disease.
abstract: OBJECTIVE
  Although the Unified Parkinson's Disease Rating Scale (UPDRS) is the most common performance measure for people with Parkinson disease (PD), the Berg Balance Scale (BBS), Forward Functional Reach Test (FFR), Backward Functional Reach Test (BFR), Timed "Up & Go" Test (TUG), and gait speed may be used to quantify some aspects of functional performance not measured by the UPDRS. The purpose of this study was to describe the relationship among a set of tests of balance, walking performance, and mobility in people with PD.
  
  
  METHODS
  Twenty-five community-dwelling adults (11 female, 14 male) with a diagnosis of PD were recruited from PD support groups in southeastern Wisconsin and consented to participate in the study. The mean age of the participants was 76 years (SD=7). The average Hoehn and Yahr Stage Scale score was 2.
  
  
  METHODS
  Functional abilities of each subject were assessed with the UPDRS, BBS, FFR, BFR, TUG, and gait speed. Spearman and Pearson correlations were performed.
  
  
  RESULTS
  The UPDRS total score was correlated with the BBS (r=-.64, P<.001), FFR (r=-.52, P<.05), and TUG (r=.50, P<.05) measurements. The BBS is the only test of functional performance where scores correlate with all other functional tests and the UPDRS.
  
  
  CONCLUSIONS
  The UPDRS total score may not reflect a comprehensive measure of mobility in people with PD. Because the BBS scores correlate both with UPDRS scores and with scores of all other tests of functional performance, the BBS appears to be a good overall measure of function in this population.
authors.affiliation: Program in Physical Therapy, Concordia University, 12800 N Lake Shore Dr, Mequon, WI 53097, USA.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Brusse
authors.forename: Sandy
authors.initials: S
authors.lastname: Zimdars
authors.forename: Kathryn R
authors.initials: KR
authors.lastname: Zalewski
authors.forename: Teresa M
authors.initials: TM
authors.lastname: Steffen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D020233:Gait Disorders, Neurologic / Q000503:physiopathology*; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology*; D004856:Postural Balance / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D015203:Reproducibility of Results