"African Americans born in those states... (with the highest infant mortality rates in 1928 – a year chosen because of the stark difference between white and black infant mortality rates and that year’s place toward the lower range of ages among the subjects of the study.)... had a 40 percent higher risk of dementia than blacks who were not born in states with high infant mortality rates. The risk was twice as high, even after accounting for differences in education and other health risk factors, as it was for whites born outside states with high infant mortality rates.
FULL STORY HERE, in the (pay-wall limits) Washington-Post.
READ the actual study HERE.