MONDAY, March 25 (HealthDay News) -- Elderly people who are socially isolated and lonely may be at greater risk of early death, British researchers report.
Lack of social contact might be an even bigger risk factor than loneliness, they added. Why, however, isolation is such a powerful predictor of death isn't clear.
"Social contact is a fundamental aspect of human existence. The scientific evidence is that being socially isolated is probably bad for your health, and may lead to the development of serious illness and a reduced life span," said lead researcher Andrew Steptoe, director of the Institute of Epidemiology and Health Care at University College London.
There is also research suggesting that loneliness has similar associations with poor health, he said.
"In many ways, social isolation and loneliness are two sides of the same coin. Social isolation indicates a lack of contact with friends, relatives and organizations, while loneliness is a subjective experience of lack of companionship and social contact," Steptoe said.
The investigators found that social isolation was a more consistent predictor of not surviving than was loneliness, and was related to greater risk of dying even after age and background health were taken into account, he said.
One expert said the findings were a little unexpected.
"You would think that loneliness would compound the risk for mortality, as opposed to just isolation -- it's a bit of a surprise," said Dr. Bryan Bruno, acting chair of psychiatry at Lenox Hill Hospital in New York City, who was not involved with the study.
However, Steptoe explained, "Knowing about how lonely participants felt did not add to our ability to predict future mortality. This is not to say that loneliness is unimportant, or that we should not strive to reduce loneliness in older men and women," he said.
"But, we need to keep
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