title: Evaluation of a Patient-Specific Index as an outcome measure for physiotherapy in Parkinson's disease.
abstract: OBJECTIVE
  The aim of this paper was to develop and evaluate a patient-specific index for physiotherapy in Parkinson's disease (PSI-PD).
  
  
  METHODS
  In the PSI-PD, patients 1) select problematic activities out of a predefined list, with one self-report item; 2) rank selected items in order of importance; and 3) rate severity for each ranked item. To examine test-retest reliability, a cohort of patients was asked to complete the PSI-PD twice. Afterwards, validity was evaluated using a telephone interview.
  
  
  RESULTS
  The PSI-PD was completed twice by 81 patients. Test-retest agreement for the selection of activity limitations was 73% to 94%. Items ranked by patients were categorized into domains, of which gait, transfers and dexterity were rated most frequently (41%-70%). Test-retest agreement for ranked domains ranged from 74% to 82%. Interviews confirmed that the PSI-PD reliably identified problem areas.
  
  
  CONCLUSIONS
  The PSI-PD is a relevant, reliable and valid instrument to identify limitations in everyday activities that are important for both PD patients and physiotherapists.
authors.affiliation: Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
authors.forename: M J
authors.initials: MJ
authors.lastname: Nijkrake
authors.forename: S H J
authors.initials: SH
authors.lastname: Keus
authors.forename: G W L
authors.initials: GW
authors.lastname: Quist-Anholts
authors.forename: S
authors.initials: S
authors.lastname: Overeem
authors.forename: M H
authors.initials: MH
authors.lastname: De Roode
authors.forename: R
authors.initials: R
authors.lastname: Lindeboom
authors.forename: W
authors.initials: W
authors.lastname: Mulleners
authors.forename: B R
authors.initials: BR
authors.lastname: Bloem
authors.forename: M
authors.initials: M
authors.lastname: Munneke
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D015331:Cohort Studies; D005260:Female; D006305:Health Status Indicators; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D010300:Parkinson Disease / Q000150:complications / Q000503:physiopathology* / Q000534:rehabilitation*; D026741:Physical Therapy Modalities; D011237:Predictive Value of Tests; D015203:Reproducibility of Results