Centenarians

Americans' lifespan shorter than previously thought, study finds

A group of researchers has developed a more accurate way of calculating mortality rates of the oldest Americans, which might lead to more realistic cost projections for Social Security and Medicare.

Dementia to reach epidemic levels among oldest old in near future, researchers say

The rate of dementia among people 90 or older will reach epidemic proportions as the number of extremely elderly individuals continues to climb, according to the recently published results of "The 90+ Study."