Key points from article :
Studied data from a national survey of 70,000 women over eight year period.
People who were 30% less likely to have died from from any disease during study.
Researchers believe that higher optimism directly impacts biological systems – possible boosting immunity and lowering inflammation.
Optimism can be altered with relatively uncomplicated and low-cost interventions.
The study was published in the American Journal of Epidemiology.
