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Predicting On-Road Driving Performance and Safety in Cognitively Impaired Older Adults
Rachel W Jones Ross1, Charles T Scialfa1, Sheila T D Cordazzo1
1Department of Psychology, University of Calgary, Calgary, Alberta, Canada.
Objectives:
To evaluate the ability to predict on-road driving in cognitively impaired older drivers.
Design:
Cross-sectional observational study.
Setting:
Laboratory tests and on-road assessment.
Participants:
Drivers with cognitive impairment (Mini-Mental State Examination score < 26, N = 43, mean age 74).
Measurements:
The Roadwise Review, a hazard perception test (HPT), several vision tests, and a standardized 18-km driving assessment.
Results:
The best prediction of passing or failing the on-road test was a combination of the HPT, leg strength, visual acuity, visual search and working memory, and number of medications taken (Nagelkerke coefficient of determination = 0.40). The sensitivity of the model was 71%, and the specificity was 75%.
Conclusion:
Further research is required to determine how these tests may be used or combined with other data (e.g., medical history) to assess fitness to drive of cognitively impaired older drivers.
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