The relationship between older drivers' performance on the Driving Observation Schedule (eDOS) and cognitive performance

Sjaanie Narelle Koppel, Judith Lynne Charlton, James William Langford, Zafiroula Vlahodimitrakou, Marilyn Di Stefano, Wendy Anne Macdonald, Barbara Mazer, Isabelle Gelinas, Brenda Vrkljan, Shawn C Marshall

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14 Citations (Scopus)


Research question/Objective: The Driving Observation Schedule (eDOS) was developed for use in the Candrive/Ozcandrive five-year prospective study of older drivers to observe the driving behavior of older drivers and monitor changes in driving behaviors over time. The aim of this study is to describe participants driving performance during the eDOS driving task and investigate the association between driving performance and cognitive measures. Methods: A subset of Ozcandrive participants (n = 144, 104 male [72 , 40 female [28 , Mean age = 81.49 years, SD = 3.58 years, Range: 76-96 years) completed the eDOS driving task. Participants drove to their selected destinations (up to 4 locations), with observations of driving behaviors (both inappropriate and appropriate) recorded for specific driving maneuvers: intersection negotiation, lane-changing, merging, low speed maneuvers and maneuver-free driving. Driving behaviors (e.g. signalling, speed regulation, gap acceptance, lane position, critical errors ) were scored by a trained observer and participants received an overall eDOS driving task score (Maximum = 100 points). Participants also completed a series of cognitive assessments as part of the Year 2 Candrive/Ozcandrive assessment protocols. Results: The overall eDOS driving task score was very high (M = 95.77; SD = 5.15; Range = 65.63-100). Detailed analyses of participants driving behavior revealed a high level of appropriate driving behavior (96 , n = 5,935 maneuvers), with few errors (4 , n = 252 maneuvers). While most participants performance on the cognitive assessments was high, some scores were below the criteria for cogntive impairment (BIC) according to conventional benchmarks: (MoCA: M = 26.56, SD = 2.12, Range = 19-30, BIC = 28 ; MMSE: M = 29.10, SD = 1.01, Range = 26-30, BIC = 0 ; Trails B: M = 111.66, SD = 43.53, Range = 50-301, BIC = 6 ).
Original languageEnglish
Pages (from-to)67 - 76
Number of pages10
JournalAnnals of Advances in Automotive Medicine
Publication statusPublished - 2013

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