Loneliness Can Cost Nearly 6 Healthy Years — SkimNews
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- Tulane University researchers published the first-of-its-kind observational study in Nature Communications, linking loneliness and social isolation to the loss of nearly six disease-free years of life.
- The team analyzed data from 277,489 adults aged 40 to 69, none of whom had seven major chronic conditions (diabetes, heart disease, lung disease, dementia, cancer, depression, anxiety) at the study's start, using age 50 as the reference point.
- Men experiencing both loneliness and social isolation lost approximately 5.8 years free from depression and anxiety, compared with 3.7 years for women — a gap lead author Lu Qi attributes partly to men being more susceptible to loneliness's effects.
- The physical-disease toll was smaller but still significant: men lost 1.7 disease-free years and women lost 2.4 disease-free years relative to those who experienced neither condition.
- Healthier habits (better diet, regular exercise, sufficient sleep, not smoking) reduced the physical-health losses tied to social isolation — but did not meaningfully offset the health risks tied to feeling lonely, the researchers found.
- The authors cite a 2023 report estimating that about half of U.S. adults experience loneliness and nearly as many are socially isolated, framing the findings as an overlooked public-health priority.
- The team plans additional population studies and clinical trials to test whether loneliness and social isolation directly cause the health effects observed, rather than merely correlating with them.
Why it matters: Roughly half of U.S. adults report feeling lonely, and the Tulane data suggests routine lifestyle prescriptions — diet, exercise, sleep — blunt the physical toll of social isolation but not the mental-health toll of loneliness itself, meaning prevention strategies that focus only on healthy habits may miss the larger driver of lost healthy years.
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