"In an effort to add to a growing interest in the long-term health influence of childhood adversity, Barnes and colleagues started by interviewing about 6,100 people who lived in Chicago and were enrolled in a study of Alzheimer's. All participants were at least 65 years old when the study began. The average starting age was 75....
"Adults who were raised in the poorest homes scored the worst on their initial cognitive tests, and as expected with age, mental sharpness dropped as people aged.
"But among African-Americans, rates of decline were slowest...."
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