Eileen Crimmins says recent research suggests the likelihood of getting dementia in old age is decreasing
NIA Aging Centers News Reference
Although the number of cases of old-age dementia has risen with the increasing size of the elderly population, recent research suggests that dementia risk among seniors has declined in the US, Canada, England, the Netherlands, Sweden, and Denmark over the past two decades. Eileen Crimmins says that an increased average life expectancy can mean different things for different conditions. For instance, more people in the US are living with heart disease today than 20 years ago, even though rates of death due to heart disease have gone down. Mortality and disease onset trends have played out more favorably for dementia: Today, fewer people have cognitive impairment, and people are not living as long with cognitive impairment, Crimmins says.
"Is Dementia Risk Falling?" - ScientificAmerican.com. 1/25/2016.