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Study Finds Link Between Cardiovascular Care, Alzheimer's

doctor in Uganda

A group of Indiana researchers is finding evidence that better treatment of cardiovascular disease could reduce the chance of a person developing Alzheimer's Disease.

The conclusion is part of a study recently published in the journal Alzheimer's and Dementia.

Researchers at Indiana University and the Regenstrief Institute in Indianapolis compared the rates of Alzheimer's in Nigerians and African Americans over 20 years.

They found in 1991, African Americans were twice as likely to have Alzheimer's as their Nigerian counterparts.

They attributed the disparity to genetics. Both groups have a gene that is linked to Alzheimer's, "but the effect of the genetic factor is very different," says Sujuan Gao, an Indiana University School of Medicine biostatistics professor.

"It's very weak in the Nigerians, and it's a strong predictor of Alzheimer's in African Americans here," Gao explains.

As the researchers continued their study, the impact environmental factors had on whether a person developed Alzheimer's overshadowed genetics.

Twenty years after the study began, the two groups experienced nearly the same rate of Alzheimer's disease, even though African Americans were more likely to have diabetes, hypertension and strokes.

"So we're speculating, and it's only speculation, that the reason for the differences in the rates is because of the better treatment of these potentially dementia related conditions," says Regenstrief Institute distinguished scientist Hugh Hendrie, another researcher on the study.

The study found the African American group had better access to health care and got better treatment for their health problems than the Nigerians.

Hendrie and Gao are working to secure another grant that will allow them to confirm their findings--that treatment for cardiovascular diseases can cut down on the prevalence of Alzheimer's.

In the meantime, Gao suggests patients do not need to change their habits as long as they are getting the treatment they already need.

"They need to be treated for the cardiovascular condition anyway, so this might just offer an additional potential benefit," Gao says.

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