Intersection Rules Subtest Timing as a Predictor of DriveSafe DriveAware Outcomes: A Pilot Study
Hoi Lam Stephanie Wong, Joan O'Donnell, Lynette MacKenzie, Belinda Joy Johnston, Carole L JamesImportance
Intersection Rules Subtest timing is a potential predictor of the DriveSafe outcome score in DriveSafe DriveAware (DSDA) assessment.
Objective
To examine whether Intersection Rules completion time is associated with DriveSafe outcome within the DSDA assessment.
Design
Retrospective, observational pilot study using secondary data.
Setting
Australian metropolitan fitness-to-drive clinic.
Participants
Of 169 participants (median age = 80; 61.5% male), 104 categorised into non-pass group of DriveSafe subtest formed ‘cases’, whilst 65 who passed were ‘controls’.
Outcomes and Measures
Primary predictor: Intersection Rules Subtest completion time in seconds. Primary outcome: DriveSafe subtest outcome, categorised as pass/non-pass. Relationships analysed using logistic regression and receiver operating characteristic (ROC) curve analysis.
Results
Longer Intersection Rules Subtest time significantly predicted lower DriveSafe subtest outcome (non-pass) scores, with each additional 60 s increasing odds of failure by 93.7% (odds ratio [OR] = 1.94, 95% confidence interval [CI] [1.40, 2.68],
Conclusions and Relevance
Intersection Rules Subtest completion time was associated with DriveSafe outcome in this pilot study. The current findings support future study of this timing metric, which may have potential as a clinical decision-support indicator, a ‘Detect and Pause’ step, after prospective validation and DSDA protocol sequence modification.