41.   In a comparison group of women who also had the mutant genes and opted only for regular checkups, one-eighth got breast cancer and one woman died.

42.   In many medical studies, patients in one group receive an experimental new treatment, while a comparison group gets a lookalike dummy pill or other placebo.

43.   Kannus did not report the total number of falls in the comparison group.

44.   Many linking the devices and infertility had no comparison group, or they compared IUD users with women whose birth control method protected against sexually transmitted diseases.

45.   Men getting surgery were six times more likely than the comparison group to improve during the follow-up.

46.   No cases were diagnosed in a comparison group of overweight people who did not take the diet drugs.

47.   Now, AZT is given to all comparison groups in U.S. studies looking for even better treatments.

48.   The comparison group received general advice and written information about diet and exercise but was not offered any specific programs.

49.   The CDC researchers found that single test-tube babies born full-term were more than twice as likely to have low birth weight as the comparison group.

50.   The patients were randomly assigned to either an exercise program or an inactive comparison group and were monitored for six months.