Just a few days ago, a dear friend of ours past to her rest at age 94. She was an incredible lady with a zest for life and and a love for other people. It is hard to believe that just a month ago she was driving her own vehicle on her errands, and living remarkably well in her own house! 

On the other hand, we also know individuals who have suffered increasing disability over a span of many years. Their quality of life has continued to deteriorate over their lifespan.

One of the concerns of scientists has been that people with low health risks tend to live longer than those with higher health risks.