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Stress and Poverty May Explain High Rates of Dementia in African-Americans

July 18, 2017

Harsh life experiences appear to leave African-Americans vulnerable to Alzheimer’s and other forms of dementia, researchers reported at the Alzheimer’s Association International Conference held July 16 in London.

Several teams presented evidence that poverty, disadvantage and stressful life events are strongly associated with cognitive problems in middle age and dementia later in life among African-Americans. The findings could help explain why African-Americans are twice as likely as white Americans to develop dementia. And the research suggests genetic factors are not a major contributor.

“The increased risk seems to be a matter of experience rather than ancestry,” says Megan Zuelsdorff, a postdoctoral fellow in the Health Disparities Research Scholars Program at the University of Wisconsin-Madison.

Scientists have struggled to understand why African-Americans are so likely to develop dementia. They are more likely to have conditions like high blood pressure and diabetes, which can affect the brain. And previous research has found some evidence that African-Americans are more likely to carry genes that raise the risk.

But more recent studies suggest those explanations are incomplete, says Rachel Whitmer, an epidemiologist with Kaiser Permanente’s Division of Research in Northern California.

The research presented at the Alzheimer’s conference suggests the missing factors involve adverse life experiences beginning in childhood. These experiences have already been linked to a range of diseases, including heart disease and cancer.

Read more on NPR.org. Read more on the Alzheimer’s Association website.

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The NNED has been a multi-agency funded effort with primary funding by the Substance Abuse and Mental Health Services Administration (SAMHSA). It is managed by SAMHSA and the Achieving Behavioral Health Excellence (ABHE) Initiative.
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