How Many People With Cognitive Impairment Still Drive?

By NOAH FROMSON-U. MICHIGAN

Researchers assessed more than 600 adults over 65 years old in Nueces County, Texas, who had cognitive assessment scores that indicated a likelihood of impairment.

Of those people with cognitive impairment, 61.4% were current drivers, and around one-third of all caregivers had concerns about their care-recipient driving.

“It is likely appropriate that some with mild cognitive impairment are still driving, but for some it may not be,” says senior author Lewis B. Morgenstern, professor of neurology, neurosurgery, and emergency medicine at University of Michigan Medical School and professor of epidemiology at the university’s School of Public Health.

“Patients and caregivers should discuss these issues with their health care providers and consider on the road driving evaluations to ensure safety.”

Approximately one in nine Americans aged 65 and older, or 6.7 million people, are estimated to live with Alzheimer’s disease and millions more have related dementias.

These conditions may affect neuropsychological and visual skills that reduce the ability to drive safely. A 2017 review of motor vehicle crash risk found that dementia had medium to large effects on driving impairment and that people with dementia have an increased likelihood of failing a road test compared to those without.

Investigators initially set out to study the driving prevalence of older Latino and non-Latino white adults, finding no significant differences between the two populations. However, the more cognitive impairment any individual had, the less likely they were to be driving.

Just over 35% of caregivers had concerns about their care recipient’s ability to drive safely, even though many study participants limited their total amount of driving and avoided driving at night or in the rain.

The discussions between caregivers and people with cognitive impairment about driving are difficult, with concerns over the loss of autonomy and potential embarrassment. When a person with cognitive impairment stops driving, that may also increase the workload of a caregiver.

Researchers say it’s best to start conversations surrounding driving earlier while the care recipient is able to understand and actively participate in the discussion.

“Close family may have discussions with aging loved ones about Advance Driving Directives,” Morgenstern says. “These are agreements between an aging person and a loved one about having conversations about driving cessation.”

Additional coauthors are from the University of Michigan and Texas A&M University, Corpus Christi. The paper appears in the Journal of the American Geriatrics Society.

This research had support from the National Institute of Neurological Disorders & Stroke and the National Institute on Aging at the National Institutes of Health. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

Source: University of Michigan

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Previously Published on futurity.org with Creative Commons License

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