title: P-drive: assessment of driving performance after stroke.
abstract: OBJECTIVE
  To investigate aspects of validity and stability of Performance Analysis of Driving Ability (P-Drive), for people with stroke when used in a driving simulator.
  
  
  METHODS
  A cross-sectional observational study.
  
  
  METHODS
  The study included a consecutive series of 101 participants with stroke referred for evaluation or selected from a stroke registry.
  
  
  METHODS
  P-Drive was used to observe driving performance in order to assess driving ability. P-Drive comprises 20 items assessing the quality of the participant's driving performance. Aspects of validity and reliability in P-Drive were evaluated using Rasch statistics.
  
  
  RESULTS
  The items (95%) and participants (97%) demonstrated acceptable goodness-of-fit and met statistical expectations according to the Rasch model. The results support internal scale validity and person response validity. P-Drive could separate the participants with different driving abilities and the standard errors were within reasonable criteria for drivers with a moderate-to-low ability to drive.
  
  
  CONCLUSIONS
  The findings from this study indicated that P-Drive is an assessment tool with properties of internal scale validity, person response validity, and which also contains aspects of reliability in relation to precision of the estimates and separation. P-Drive seems to be a valid and stable assessment tool for assessing the driving ability in a simulator of people with stroke.
authors.affiliation: Neurotec Department, Division of Occupational Therapy, Karolinska Institutet, Stockholm, Sweden. ann-helen.patomella@ki.se
authors.forename: Ann-Helen
authors.initials: AH
authors.lastname: Patomella
authors.forename: Kerstin
authors.initials: K
authors.lastname: Tham
authors.forename: Anders
authors.initials: A
authors.lastname: Kottorp
mesh_terms: D000368:Aged; D001334:Automobile Driving; D003198:Computer Simulation; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011597:Psychomotor Performance; D015203:Reproducibility of Results; D020521:Stroke / Q000523:psychology; D000071939:Stroke Rehabilitation