Health
In a study, doctors compared two treatments for stomach pain, a new and an old treatment. They tossed a coin to decide who would get which treatment. Some people who took the new treatment felt ill and changed to the old treatment instead. At the end of the study, the doctors compared how much pain people experienced. The people who had changed from the new treatment to the old treatment were counted among those who were given the old treatment. The doctors found that the new treatment was better.