A new study suggests subtle changes in driving patterns – such as reduced nighttime trips or shorter routes – could serve as an early warning sign for cognitive decline, even years before a formal dementia diagnosis. Researchers at the Washington University School of Medicine followed nearly 300 older drivers for over three years, utilizing GPS data to identify potential indicators of developing cognitive impairment. the findings, reported by fr.de, highlight the potential for leveraging everyday activities to detect neurodegenerative diseases at earlier, more treatable stages.
Subtle changes in driving habits may signal cognitive decline years before a formal dementia diagnosis, a new analysis of GPS data from older drivers suggests. This research highlights the potential for using everyday activities to detect early signs of neurodegenerative disease.
Fulda – A long-term study from the American Academy of Neurology indicates that seemingly minor shifts in daily routines – such as older adults avoiding nighttime driving, reducing the frequency of trips, and shrinking their driving radius – could be early indicators of cognitive issues, potentially appearing long before a physician identifies cognitive impairment.
Researchers utilized GPS data loggers to track the driving behavior of older drivers for up to 40 months to reach these conclusions. As fr.de reports, a team led by Ganesh M. Babulal of the Washington University School of Medicine in St. Louis followed 298 older drivers for over three years. The participants, with an average age of 75, drove at least weekly and were still actively driving at the study’s outset. Fifty-six participants had mild cognitive impairment, while 242 were considered cognitively healthy.
Changes in Driving Patterns as Early Warning Signs for Dementia
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The vehicles were equipped with GPS data loggers that automatically recorded each trip, including distance, duration, time of day, speed, braking behavior, and route deviations. Participants also underwent regular cognitive and memory tests. Initially, driving patterns showed little difference. “However, over the years, participants with mild cognitive impairment drove less frequently, for shorter distances, and mostly on familiar routes. They also more often avoided nighttime driving and rarely deviated from their usual routes,” according to fr.de.
Using the recorded GPS data, researchers were able to correctly predict who would develop mild cognitive impairment in 82% of cases. Combining the data with age, test scores, and genetic markers increased accuracy to 87%. Without the driving data, the accuracy rate was only 76%. “We were able to more accurately determine who developed cognitive problems using a GPS data-tracking device than with age, memory tests, or genetic factors alone,” explained researcher Babulal.
The study underscores that even seemingly everyday changes in driving behavior can be an early warning sign of cognitive problems, potentially appearing years before noticeable memory issues. Key changes to watch for include fewer trips per month, a noticeable decrease in nighttime driving, and a reduced variety of routes, with longer trips or spontaneous detours becoming less frequent.
“Observing daily driving behavior is a relatively simple and unobtrusive way to assess cognitive function,” Babulal said. This could allow for early identification of at-risk drivers before accidents or near-misses occur, which are more common later in the disease’s progression. Early detection also holds significant public health benefits.
Better Than Dementia Tests? GPS Data as an Indicator of Brain Changes
Early detection allows for timely support to be offered to those affected, which in turn can help maintain safety and mobility for as long as possible. However, sensitive handling of this data is also essential, protecting individuals’ privacy and ensuring data security.
Generally, “driving ability” in the early stages of dementia remains relatively high, according to the German Alzheimer’s Association, citing research studies and practical driving tests. However, as the disease progresses, impairments in mental performance increasingly occur. Vision problems, which often first become apparent while driving, can also be an early sign of dementia.
A driving assessment on the road can provide a meaningful evaluation of driving fitness. According to the Alzheimer’s Association, this should be conducted by a qualified professional, such as a driving instructor. The ADAC, for example, offers a “Driving Fitness Check” as well as counseling and driver safety training for older drivers.
Driving: These Recommendations Apply to Dementia Patients
Experts recommend regular medical evaluations. “Doctors are obligated under the doctor-patient agreement to inform their patients if they are unfit to drive or will become so in the course of the illness.” If family members are unsure whether the affected person can still drive safely, they can ask themselves: “Would I let my child or grandchild ride with them in the car?” If the answer is no, they should insist that driving be stopped, according to an information sheet from the German Alzheimer’s Association.
Certain sleep behavior can also be an early sign of dementia and can indicate brain disease years before a diagnosis.
