A recent study highlights that age is the primary factor in memory decline, with significant drops observed after age 75 and more pronounced effects after 85. Depression and chronic conditions like diabetes also negatively affect initial memory scores.
While loneliness itself did not accelerate the speed of cognitive decline, it influenced the starting point of memory levels. The research also found that physical activity is associated with better initial memory performance, acting as a 'cognitive buffer' by raising baseline scores without altering the rate of decline.
Previous research suggests loneliness may impact cognition through reduced social interaction, increased risk of depression, and a higher incidence of health problems such as hypertension and diabetes.
With global populations aging rapidly, with one in six people expected to be over 65 by 2050, dementia and neurodegenerative diseases present a growing challenge for healthcare systems.