Extensive research across 12 countries shows isolation impacts memory performance early, but not the pace of cognitive decline.
By yourNEWS Media Newsroom
A large-scale European study examining more than 10,000 older adults has found that loneliness is associated with lower memory performance at the outset of aging, though it does not appear to speed up cognitive decline over time.
The research, published April 13 in the journal Aging and Mental Health, analyzed data collected between 2012 and 2019 from participants aged 65 to 94 across 12 countries. All individuals included in the study were free of dementia at the start. Researchers relied on data from the Survey of Health, Aging and Retirement in Europe and used standardized measures to assess loneliness, focusing on feelings of isolation, lack of companionship and social exclusion.
Approximately 8% of participants were classified as experiencing high levels of loneliness. Cognitive performance was evaluated using word recall tests conducted immediately and after a short delay. Results showed that individuals reporting higher loneliness consistently scored lower at baseline, recalling fewer words than their less-lonely counterparts.
Participants identified as highly lonely recalled an average of 4.9 words in immediate tests compared to 5.4 among others. In delayed recall, they averaged 3.5 words, compared to 4.1 for those reporting lower loneliness. Despite this initial gap, both groups experienced similar rates of memory decline over a six- to seven-year period.
“The finding that loneliness significantly impacted memory, but not the speed of decline in memory over time was a surprising outcome,” said lead author Dr. Luis Carlos Venegas-Sanabria of Universidad del Rosario in Colombia. “It suggests that loneliness may play a more prominent role in the initial state of memory than in its progressive decline.”
The study adds to a body of research that has produced mixed conclusions about the relationship between loneliness and long-term cognitive decline. Researchers noted that the scale and geographic diversity of the dataset strengthen the reliability of the findings.
Further analysis revealed that loneliness often coincided with other health and lifestyle factors known to influence cognitive outcomes. Individuals experiencing higher levels of loneliness were more likely to be older, female, less physically active and less socially engaged. They also had higher rates of depression, hypertension and diabetes.
Researchers indicated that these overlapping conditions complicate the relationship between loneliness and memory. Rather than acting as a direct cause of cognitive deterioration, loneliness may intensify the effects of these other risk factors, potentially lowering cognitive resilience.
Geographic trends were also observed, with higher rates of loneliness reported in Southern European countries. Participants in Southern and Eastern Europe also demonstrated lower baseline memory scores compared to those in other regions. However, researchers cautioned against drawing broad conclusions from these patterns, emphasizing the importance of cultural and historical context.
The findings highlight loneliness as a factor closely tied to early cognitive performance in aging populations, even if it does not appear to influence the rate of decline. Researchers emphasized the importance of addressing social isolation as part of broader efforts to support both emotional health and cognitive function in older adults.
Experts suggest that increased social engagement, community involvement and support networks may help mitigate the effects of loneliness. The study underscores that while loneliness may not independently drive cognitive decline, its association with other health risks makes it a significant factor in overall well-being among aging populations.
Watch this video explaining how the loneliness epidemic is destroying society.
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Source: Natural News
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