Test–Retest Reliability of the Preroad DriveABLE Competence Screen

ABSTRACT Objective: To determine the test–retest reliability of a computerized preroad screen of prerequisite skills required for safe driving. Subjects & Methods: Driveable Screen administered to 39 individuals referred for driving evaluation due to cognitive decline or stroke. The Screen provides three recommendations—driving cessation, indeterminate, no evidence of reduced competence. Predicted probability of failing the road test is also generated. Results: Reliability according to the recommendation was substantial for the entire group (K = 0.654; CI = 0.459–0.848) and subgroup with stroke (K = 0.742; CI = 0.540–0.944). The numbers of participants with cognitive decline was too small to allow subgroup analyses. Of the nine participants with test–retest disagreement in recommendation, Test 2 was always better (McNemar's X2 = 9.00, p = 0.01). Excellent reliability was found on probability of failing the Road Test (Intraclass Correlation Coefficient = 0.908; CI = 0.832–0.950). The test–retest reliability of the subtests ranged from fair to substantial. Conclusions: The Screen demonstrates sufficient test–retest reliability to encourage its use. However, the finding of significantly better scores on Test 2 for a portion of participants raises concern regarding its validity with repeat testing.

[1]  Jacob Cohen.  A Coefficient of Agreement for Nominal Scales , 1960 .

[2]  N. Korner-Bitensky,et al.  Predicting ability to drive after stroke. , 1998, Archives of physical medicine and rehabilitation.

[3]  A R Dobbs,et al.  Evaluating the Driving Competence of Dementia Patients , 1997, Alzheimer disease and associated disorders.

[4]  E. Wiseman,et al.  The older driver: a handy tool to assess competence behind the wheel. , 1996, Geriatrics.

[5]  A. Feinstein,et al.  Clinical biostatistics: LIV. The biostatistics of concordance , 1981 .

[6]  N. Korner-Bitensky,et al.  Driving evaluation practices of clinicians working in the United States and Canada. , 2006, The American journal of occupational therapy : official publication of the American Occupational Therapy Association.

[7]  Emmanuel Strypstein,et al.  Determinants of driving after stroke. , 2002, Archives of physical medicine and rehabilitation.

[8]  A R Dobbs,et al.  A comparative approach to identify unsafe older drivers. , 1998, Accident; analysis and prevention.

[9]  Martin G. Gibson,et al.  The Design and Analysis of Clinical Experiments , 1987 .

[10]  G.,et al.  A review of statistical methods in the analysis of data arising from observer reliability studies (Part II)* , 2007 .

[11]  M. White,et al.  Visual testing for readiness to drive after stroke: a multicenter study. , 2000, American journal of physical medicine & rehabilitation.

[12]  W. Lambert,et al.  Cognitive Behavioral Driver's Inventory , 1988 .

[13]  Nicol Korner-Bitensky,et al.  The DriveABLE Competence Screen as a predictor of on-road driving in a clinical sample. , 2009, Australian occupational therapy journal.