Human study · Research · 22 Sept 2026
Loneliness and isolation tracked fewer disease-free years in adults aged 40 to 69
Source: Tulane University / News-Medical
What the research found
Study (observational). Wang, Lu Qi, and colleagues report in Nature Communications (doi 10.1038/s41467-026-74498-8; Tulane note 22 September 2026) on 277,489 adults aged 40 to 69 who were free of seven major chronic conditions at the start. From age 50, people with both loneliness and social isolation had fewer years free of physical disease than people with neither: about 2.4 fewer years in women and 1.7 in men. Years free of mental disorders fell more: about 3.7 in women and 5.8 in men. A healthier pattern of daily habits narrowed the years lost with social isolation, but it did not clearly shrink the extra risk tied to loneliness. Isolation here is how many connections someone has; loneliness is dissatisfaction with those ties. Observational, not a trial. Educational research notes.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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