According to new research published in the Journal of the American Geriatrics Society,  there is a link between regular use of the internet and a lower risk of dementia.

In a population-based cohort study researchers followed dementia-free adults aged 50–64.9 for a maximum of 17.1 (median = 7.9) years. The association between time-to-dementia and baseline internet usage was examined. In addition,  the interaction between internet usage and education, race-ethnicity, sex, and generation was assessed. Furthermore, the study looked at whether the risk of dementia varies by the cumulative period of regular internet usage to see if starting or continuing usage in old age modulates subsequent risk. The study also examined the association between the risk of dementia and daily hours of usage.

Results

In 18,154 adults, compared with nonregular internet use, regular internet use at baseline was linked with approximately half the risk of dementia, analysis showed. Researchers reported a cause-specific hazard ratio of 0.57. The difference in dementia risk between participants who did and did not use the internet regularly was consistent regardless of educational attainment, race-ethnicity, sex, and generation.

The study also found that periods of regular use in late adulthood were associated with significantly reduced dementia risk; the cause-specific hazard ratio was 0.80. The finding, researchers wrote, suggests that cognitive health can be modified by changes in internet use, even in late adulthood. The lowest dementia risk, according to the study, was among adults who used the internet between 0.1 and 2 hours a day.

Investigators pointed out that since a person’s online engagement may include a wide range of activities, future research may identify different patterns of internet usage associated with the cognitively healthy lifespan while being mindful of the potential side effects of excessive usage.

Study:
Cho, G, Betensky RA, Chang VW. Internet usage and the prospective risk of dementia: A population-based cohort study. Journal of the American Geriatrics Society. First published: 03 May 2023. https://agsjournals.onlinelibrary.wiley.com/doi/10.1111/jgs.18394