Walking Problems May Predict Dementia

But researchers say preventive measures are possible

By Ed Edelson
HealthDayNews Reporter

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WEDNESDAY, Nov. 27 (HealthDayNews) -- Peculiar kinds of abnormal walking in the elderly can be warning signs of the mind-sapping condition called dementia, a study finds.

Although this might sound very scary to an older person who is unsteady on his feet, it's actually good news, researchers say.

"The last thing I want to do is create a panic about walking slower," says Dr. Joe Verghese, assistant professor of neurology at Albert Einstein College of Medicine and lead author of a report on the finding, which appears in tomorrow's issue of the New England Journal of Medicine.

"Lots of people have difficulty walking when they get older, and 60 or 70 percent of the time it is caused by things like arthritis or back trouble," he adds."

The study didn't look at people with walking problems caused by arthritis. But other kinds of abnormal gait are warning signs of vascular dementia, which does not get the name recognition of Alzheimer's disease, the major cause of dementia in the aging, but does account for 30 percent of cases, Verghese says.

Gait problems included marked swaying, balance trouble, the inability to walk heel-to-toe, short steps, shuffling, not swinging the arms, and difficulty making turns.

"The surprise was how strong a predictor [abnormal gait] was and how it predicted into the future, at least 10 years into the future," Verghese says.

And that is good news because vascular dementia is potentially preventable. It results from diminished flow of blood to the brain, and measures can be taken to keep blood flow at a normal level -- "better control of blood pressure, better control of cholesterol," Verghese says.

The finding comes from the Einstein Aging Study, which has followed a large number of older people for more than two decades. This part of the study looked at 422 individuals between the ages of 75 and 85, whose gait was evaluated when they enrolled in the study. In a follow-up period averaging 6.6 years, 70 of the participants developed Alzheimer's disease and 47 developed vascular dementia. The people with neurological gait disorders had more than three times the risk of vascular dementia than those with normal gaits, although their risk of Alzheimer's disease was not affected.

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