The American life-style and environment have changed dramatically in the last two decades. Have these changes had any effects, good or bad, on the incidence of various cancers and possibly some other diseases?
The American Cancer Society (ACS) will try to find out by questioning 1 million women and men over the next six years. The first step is to test a basic questionnaire in Tampa, Fla, to see if it produces enough of the desired information.
It was in 1959 that 68,000 ACS volunteers, directed by E. Cuyler Hammond, PhD, began the first such study of a comparable number of Americans. Data from that study, say ACS officials, suggested the following: dangers in cigarette smoking, added risk of uterine or ovarian cancer among obese women, beneficial effects of moderate exercise in cardiovascular disease prevention, and the association of sexual intercourse at an early age with increased risk of cervical