New research from Rush University Medical Center suggests that maintaining an active social life can significantly delay the onset of dementia. The study, published in Alzheimer’s & Dementia, found that older adults who frequently engaged in social activities, such as visiting friends and family, attending social events, and participating in community gatherings, had a reduced risk of cognitive decline.
Researchers believe that social activity strengthens neural connections in the brain, making them more resilient to age-related changes. Social interaction activates brain regions responsible for thinking and memory. The study found a 38% reduction in dementia risk and a 21% reduction in mild cognitive impairment risk among the most socially active group.
The study estimates that a five-year delay in dementia onset could mean three additional years of life and a 40% reduction in related costs. This could translate to roughly $500,000 in lifetime healthcare savings per person.
The study involved 1,923 dementia-free older adults (average age 80). Participants underwent annual evaluations. Social activity was assessed via a questionnaire focusing on common social engagements. Cognitive function was measured using 21 tests.
Over five years, 545 participants developed dementia, and 695 developed mild cognitive impairment. The most socially active participants showed reduced dementia rates. The analysis adjusted for factors like age, physical activity, and health.
While the precise link remains unclear, researchers suggest that “social activity challenges older adults to participate in complex interpersonal exchanges, which could promote efficient neural networks.” Future research will explore if interventions increasing social activity can delay or prevent cognitive decline.