A record number of elderly people are completing living wills to guide end-of-life medical treatments, according to new research from the University of Michigan. The study, co-authored by Dr. John Piette, professor of health behavior and health education and co-director for the Center for Managing Chronic Disease, found that although the percentage of people completing living wills increased from 42 percent in 2000 to 72 percent in 2010, there was little difference in hospitalization rates.