A dementia smell test

People with a poor sense of smell may be more likely to develop dementia, a new study suggests. Researchers at the University of Chicago tested how well 2,906 men and women between the ages of 57 and 85 could detect five different scents: peppermint, fish, orange, rose, and leather. Most of the participants were able to identify four to five of the smells, but 22 percent couldn’t. Five years later, the researchers found that those who didn’t pick up at least four of the odors were more than twice as likely to have dementia—even if