Other characteristics of healthy centenarians, garnered from a number of studies, are these: Most have high native intelligence, a keen interest in current events, a good memory, and few illnesses. They tend to be early risers, sleeping on average between six and seven hours. Most drink coffee, follow no special diets, but generally prefer diets high in protein, low in fat. There is no uniformity in their drinking habits, but they use less medication in their lifetimes than many old people use in a week. They prefer living in the present, with changes, and are usually religious in the broad sense.