If chipper and optimistic people annoy you, here's a finding that will make you hate them even more: they'll outlive everyone else ...

A study of 100,000 women presented at the American Psychosomatic Society's annual meeting Thursday found a strong correlation between optimism and a person's risk for cancer-related death, heart disease and early death.

Researchers surveyed the personality traits of middle-age women in 1994 as part of the Women's Health Initiative study run by the National Institutes of Health.

Eight years later, researchers found that the self-reported optimistic women were less likely to have died for any reason and had a 30 percent lower death rate from heart disease.

Meanwhile, women scoring high on the hostile scales had a higher general death rate and a 23 percent greater risk of dying from a cancer-related condition by the end of the study.

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