DEAR DOCTOR K: I've heard that women tend to live longer than men. Why is that?
DEAR READER: On average, women do live about five years longer than men. In the United States, 57 percent of all who are ages 65 and older are female. By age 85, 67 percent are women. You can see this for yourself in most nursing homes or assisted living facilities in the United States: Women usually outnumber men, and the magnitude of the difference is often striking.