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Published on: December 16, 2022
P-drive: assessment of driving performance after stroke
Ann-Helen Patomella1, Kerstin Tham, Anders Kottorp
1Neurotec Department, Division of Occupational Therapy, Karolinska Institutet, Stockholm, Sweden. ann-helen.patomella@ki.se
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.
Design:
A cross-sectional observational study.
Subjects:
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.
Conclusion:
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.
