Loneliness and social isolation reduce healthy life expectancy

A study published in Nature Communications, led by researchers at Tulane University, has quantified the impact of loneliness and social isolation on healthy life expectancy. By analyzing the records of over 277,000 adults aged 40 to 69, researchers found that these conditions significantly reduce the number of years lived without physical or mental illness.

Regarding physical health, women experiencing both loneliness and social isolation lost an average of 2.4 years of healthy life, while men lost 1.7 years. The impact on mental health was more pronounced: men lost approximately 5.8 years of life without psychological disorders, compared to 3.7 years for women.

The study distinguishes between social isolation, which refers to limited social interaction or a small social circle, and loneliness, which describes a person's subjective dissatisfaction with the quality of their relationships. Both factors are linked to increased risks of chronic conditions, including cardiovascular disease, diabetes, and cognitive decline.