The Alameda County Study on Social Networks and Mortality
A landmark longitudinal study conducted in Alameda County, California, provided strong evidence for the link between social networks and longevity. The study followed nearly 7,000 residents for nine years and found that individuals with fewer social and community ties had a significantly higher risk of dying during the follow-up period. Specifically, isolated men and women were 2.3 and 2.8 times more likely to die, respectively, than those with extensive social networks. This association remained strong even when controlling for other health-related factors like smoking, alcohol use, physical activity, and initial health status.
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