Loneliness Linked to Mortality: A 50% Risk Jump, Sparking Global Health Action
A 2010 meta-analysis of 148 studies (about 308,849 people) found that weak social connections raise mortality risk by roughly 50% (OR 1.50, 95% CI 1.42–1.59), comparable to smoking 15 cigarettes per day, based on ~7.5 years of follow-up. Although the study examined social relationships rather than loneliness per se, later work refined the distinction and magnitude, and policy responses worldwide—such as UK and Japan appointing loneliness ministers and the US Surgeon General issuing a loneliness advisory—have pushed public health to address loneliness, isolation, and living alone as related yet distinct risk factors.
