As the American population ages, a new study finds the average lifetime risk of dementia for adults over 55 is around 42 percent—a higher rate than previously thought

New research suggests that the risk for developing dementia is significantly higher than previously estimated, and the burden on the United States population will grow substantially over the next few decades.

A new study found that dementia cases in the United States are projected to double from more than 500,000 in 2020 to about 1 million by 2050.