Laboratory Equipment | Keeping dementia at bay: Column USA TODAY Because we are adding, on average, at least two years to our lifespan every decade, we are all more prone to dementia. One's chances of dementia double every five years after age 65; one of every two Americans older than 85 is afflicted with Alzheimer's. The Risk of Alzheimer's Disease Is on the Decline Alzheimer's Risk for Older Adults on the Decline Some Good News on the Dementia Front |