title: Visual testing for readiness to drive after stroke: a multicenter study.
abstract: OBJECTIVE
  The purpose of this study was to determine the ability of a visual-perception assessment tool, the Motor-Free Visual Perception Test, to predict on-road driving outcome in subjects with stroke.
  
  
  METHODS
  This was a retrospective study of 269 individuals with stroke who completed visual-perception testing and an on-road driving evaluation. Driving evaluators from six evaluation sites in Canada and the United States participated. Visual-perception was assessed using the Motor-Free Visual Perception Test. Scores range from 0 to 36, with a higher score indicating better visual perception. A structured on-road driving evaluation was performed to determine fitness to drive. Based on driving behaviors, a pass or fail outcome was determined by the examiner.
  
  
  RESULTS
  The results indicated that, using a score on the Motor-Free Visual Perception Test of < or =30 to indicate poor visual-perception and >30 to indicate good visual perception, the positive predictive value of the Motor-Free Visual Perception Test in identifying those who would fail the on-road test was 60.9% (n = 67/110). The corresponding negative predictive value was 64.2% (n = 102/159). Univariate logistic regression analyses revealed that older age, low Motor-Free Visual Perception Test scores and a right hemisphere lesion contributed significantly to identifying those who failed the on-road test.
  
  
  CONCLUSIONS
  The predictive validity of the Motor-Free Visual Perception Test is not sufficiently high to warrant its use as the sole screening tool in identifying those who are unfit to undergo an on-road evaluation.
authors.affiliation: Jewish Rehabilitation Hospital Research Center, Laval, Quebec, Canada.
authors.forename: N A
authors.initials: NA
authors.lastname: Korner-Bitensky
authors.forename: B L
authors.initials: BL
authors.lastname: Mazer
authors.forename: S
authors.initials: S
authors.lastname: Sofer
authors.forename: I
authors.initials: I
authors.lastname: Gelina
authors.forename: M B
authors.initials: MB
authors.lastname: Meyer
authors.forename: C
authors.initials: C
authors.lastname: Morrison
authors.forename: L
authors.initials: L
authors.lastname: Tritch
authors.forename: M A
authors.initials: MA
authors.lastname: Roelke
authors.forename: M
authors.initials: M
authors.lastname: White
mesh_terms: D000368:Aged; D001334:Automobile Driving; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D000071939:Stroke Rehabilitation; D014796:Visual Perception