Even sleeping only 4.5 hours per night is associated with very little increase in mortality.

This is thought to be associated with a reduction in mortality.

Thus exercise has been associated with a decrease in mortality.

Changes in mortality have had an effect upon life expectancy - the age to which the average person can expect to live.

It was a 27-pitch exercise in mortality on the mound.

The increase in mortality was most pronounced among those between ages 15 and 49.

Heat, which can cause up to a 30% increase in mortality amongst the elderly and very young.

Studies have shown that 77% of untreated cases result in mortality.

Only in mortality can the true guts of existence be experienced.

Social class is a major factor in infant mortality, both historically and today.