A new study shows that Americans' risk of developing dementia at any time after turning 55

is more than double what earlier research found.

The New York University study estimates that the number of dementia cases will double by 2060,

reaching one million new diagnoses each year.

Dr. Joseph Koresh is the director of the Optimal Aging Institute at NYU's

Langone Health System. He's also one of the authors of the study. Dr. Koresh, how significant is the findings?

I think it's important for all of us, right? Because if you're thinking about your lifelong health,

it makes you realize that you need to consider the risk

that at some point you may hit dementia before death.

And what accounts for the higher risk?

So basically, we did a study that was more diverse

in more centers and span both white and black Americans.

And we also spent an enormous amount of energy to make sure we captured all of the cases.

And then the population has gotten older.

So as life expectancy has gotten older, the risk is higher.

So the risk by age 75 is 4%.

By age 85, it's 20%.

And by age 95, it rises to the full 42% chance

of getting to dementia before death,

but more than half the risk is after age 85.

So I just wanna make sure I understand,

this is because the population is aging. 85. So I just want to make sure I understand this is because the

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