01592881

Component

https://doi.org/10.3141/2584-09

The objective of this longitudinal study was to examine time-varying correlations between multiple indexes of physical function and driving mobility in older adults across 5 years. The participants were older drivers aged 65 to 91 (M = 73.6 ± 5.78) who were randomly assigned to the no-contact control arm of the Advanced Cognitive Training for Independent and Vital Elderly Study (N = 598). The driving mobility outcomes were self-reported driving space, driving exposure, driving frequency, and weekly mileage assessed at baseline and first, second, third, and fifth follow-up visits. Physical functioning measures included grip strength, the turn 360 test, and self-reported physical function. Multilevel models examined relationships between changes in physical functioning and driving mobility outcomes over 5 years. The results indicated that driving space and driving frequency decreased over time, especially for older individuals. Changes in physical function were positively related to changes in driving mobility after controlling for demographics, attrition, baseline cognitive function and visual acuity, and changes in general health. Patterns of associations varied depending on the specific physical function measure and mobility outcome. The findings highlight the time-varying nature of the relationships between physical functioning and driving mobility. Further research is needed to understand fully the dynamic associations between driving mobility and key components of mobility that vary over time.

01590544

16-5934

English

pp 70–76

2016

Transportation Research Record: Journal of the Transportation Research Board

9780309441162

Print

References (47) ; Tables (2)

Aged drivers; Driver performance; Fitness to drive; Mobility; Physical disabilities; Physical fitness; Risk assessment

Highways; Safety and Human Factors

TRIS, TRB, ATRI

Jan 12 2016 6:38PM

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