P-drive: assessment of driving performance after stroke.
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.
Patomella
Ann-Helen
AH
Neurotec Department, Division of Occupational Therapy, Karolinska Institutet, Stockholm, Sweden. ann-helen.patomella@ki.se
Tham
Kerstin
K
Kottorp
Anders
A
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