SWOV Catalogus

315231

Alzheimer and vascular dementias and driving : a prospective road and laboratory study.
981305 ST [electronic version only]
Fitten, L.J. Perryman, K.M. Wilkinson, C.J. Little, R.J. Burns, M. Pachana, N. Mervis, J.R. Malmgren, R. Siembieda, D.W. & Ganzell, J.R.
The Journal of the American Medical Association JAMA, Vol. 273 (1995), p. 1360-1365, 37 ref.

Samenvatting The objective of this study was to characterize on-the-road, behind-the-wheel driving abilities and related laboratory performances of subjects with mild Alzheimer’s disease (AD) and vascular dementia. A prospective, experimental study in Greater western Los Angeles involving two mild dementia and three age and health control groups was performed. Road test reliability and validity were assessed. Subjects were enrolled from the community by referral and from the Veterans Affairs dementia and diabetes clinics. Eighty-seven driving subjects were enrolled; 83 completed the study. A sample of eligible dementia clinic subjects consisting of 15 mild AD patients met National Institute of Neurological and Communicative Disorders and Stroke-Alzheimer’s Disease and Related Disorders Association probable AD criteria, while 12 met `Diagnostic and Statistical Manual of Mental Disorders, Revised Third Edition’ and Hachinski diagnostic criteria for multi-infarct dementia (vascular dementia). Clinic control subjects consisted of 15 age-matched patients with diabetes and without a history of stroke or dementia. Community controls consisted of 26 healthy, age-matched, older subjects (>60 years) and 16 young subjects (20 to 35 years). Main outcome measure was the drive score from the Sepulveda (California) road test and laboratory measures of attention, perception, and memory. The drive scores in the mild AD group (mean, 22.1; SD, 3.8) and in the vascular dementia group (mean, 24.0; SDI 7.8) differed significantly (P<.001 studentized range test) from the drive scores in the diabetic control group (mean, 31.5; SD, 3.9), the older control group (mean, 32.6; SD, 2.8), and the young control group (mean, 33.6; SDI 3.2). Drive score among the three control groups did not vary significantly. Short-term memory (Sternberg), visual tracking, and Folstein Mini-Mental State Examination scores correlated best with drive score, with a cumulative R² of 0.68. Drive score and number of collisions and moving violations per 1000 miles driven were negatively correlated (r=-0.38; P<.02). Based on this study, type and degree of cognitive impairment are better predictors of driving skills than age or medical diagnosis per se. Specific testing protocols for drivers with potential cognitive impairment may detect unsafe drivers more effectively than using age or medical diagnosis alone as criteria for license restriction or revocation. (A)
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