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Brain & Nervous System Health Center

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Seniors With Mental Declines May Face Earlier Death

Those with memory loss fared better than those who showed deficits in thinking abilities

WebMD News from HealthDay

By Dennis Thompson

HealthDay Reporter

WEDNESDAY, April 23, 2014 (HealthDay News) -- Seniors with mild symptoms of mental decline may face a higher risk of dying earlier than those with no thinking or memory problems, new Mayo Clinic research suggests.

Folks with mild impairment of memory or thought had an 80 percent higher death rate during the six-year study, compared to people with their mental faculties intact, according to findings that are to be presented Wednesday at the American Academy of Neurology annual meeting in Philadelphia.

The research also revealed that losing one's ability to think is much more dire than losing one's memory.

People with declining language, attention and decision-making abilities -- but no memory loss -- had more than twice the death rate during the study than people with no mental decline at all.

By comparison, people with only memory loss had just a 68 percent higher death rate during the study compared to people with no thinking or memory problems, according to the study.

Underlying chronic diseases likely are contributing to both mental decline and increased risk of death, said Dr. Marc Gordon, chief of neurology at Zucker Hillside Hospital, in Glen Oaks, N.Y.

Health problems such as cardiovascular disease can trigger diseases like vascular dementia, in which low blood flow to the brain causes a decline in a person's thinking abilities, said Gordon, who's also an Alzheimer's disease researcher at the Feinstein Institute for Medical Research in Manhasset, N.Y.

"I assume that there is an underlying disease process that is going to manifest earlier as brain dysfunction and later on lead to death," Gordon said. Such disease-driven forms of mental decline also tend to play havoc more with reasoning and thought than memory, he added.

Mild mental decline often serves as an early sign of Alzheimer's disease, but the study found no difference in the death rate between people who ended up developing dementia and those who did not.

That finding supports the idea of an underlying health problem, Gordon said.

"Perhaps there may be other things going on that affect the brain and that also affect mortality, whether or not you develop dementia," he said.

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