Glass-half-full women reap lifelong rewards

A team of Harvard researchers have pinpointed an optimistic outlook as one of the main drivers of longevity.

Their study found that optimistic women were much less likely to die from several major causes of death--including cancer, heart disease, stroke, respiratory disease and infection--over an eight-year period, compared with their glass-half-empty peers.

Significantly, the researchers found healthy behaviours only partially explained the link between optimism and reduced mortality risk.

The other possibility, they say, is that higher optimism directly impacts the biological systems.