Disease prevalence rates differ for men and women; this comes as news
neither to physicians nor to laypersons. Likewise, women's life expectancies
differ from those of men. Among some populations, this difference is dramatic.
For example, the National Center for Health Statistics reports that, in 2001,
the life expectancy of a black American woman was 75.5 years and that of a
black American man was just 68.6
women live, on the average, between four and ten years longer than men do.