Recent research suggests that the driving behaviors of elderly individuals could serve as early indicators of dementia. Scientists claim that how older people behave behind the wheel may offer insights into their brain health.
A study found that higher levels of white matter damage in the brain were associated with reduced driving frequency, fewer trips, sticking to familiar routes, and increased driving errors, particularly in those who later developed dementia. Conversely, individuals aged 65 and above who were taking blood pressure medication were less likely to exhibit risky driving behaviors, even in the presence of brain damage.
According to a team of American researchers, subtle alterations in daily driving routines could indicate early signs of brain changes and an increased risk of dementia, even before noticeable memory or cognitive symptoms manifest. The study, conducted in St. Louis, Missouri, monitored 220 drivers with an average age of 73 over a five-year period.
Data was collected between 2016 and 2024, tracking participants’ driving metrics like frequency, distance, destinations, and safety events such as speeding, collisions, hard braking, and cornering. MRI brain scans were conducted at the study’s onset, with some participants undergoing a second scan at least 12 months later. Annual cognitive assessments were also performed to analyze the correlation between white matter hyperintensities and driving patterns.
Professor Chia-Ling Phuah from the Barrow Neurological Institute in Phoenix emphasized that older adults’ driving habits can indicate early changes in brain health. She highlighted that shifts in daily driving patterns could offer crucial insights into brain changes before traditional cognitive symptoms become evident.
Among the participants who developed cognitive impairment, those with higher white matter hyperintensity burden on brain imaging were more likely to engage in unsafe driving practices and experience more accidents. Medications, especially ACE inhibitors for high blood pressure, were linked to safer driving habits even in individuals with significant brain damage.
The study’s findings suggest that monitoring driving behaviors using in-vehicle data loggers could help identify older drivers at higher risk for unsafe driving practices, loss of independence, and cognitive issues. Participants taking blood pressure medications, particularly ACE inhibitors, maintained safer driving behaviors despite brain damage, indicating potential benefits for brain health as individuals age.
The study results are set to be presented at the American Stroke Association’s International Stroke Conference in New Orleans. Duke University Neurology Professor Nada El Husseini praised the findings and suggested further investigation into the impact of ACE inhibitors on cognitive function and driving safety in individuals with white matter disease. She also recommended considering cognitive screening and brain imaging for individuals experiencing driving difficulties.