Memory loss more common with certain blood type
New research published in the journal Neurology suggests that people with the blood type AB are 82 percent more likely that other types to develop thinking and memory problems that may lead to dementia. Blood type AB is found in only 4 percent of the U.S. population.
Researchers at the University of Vermont College of Medicine used data from a larger study called REGARDS, which stands for the Reasons for Geographic And Racial Differences in Stroke. This research followed 30,000 people for 3.4 years.
Of those involved who did not have memory or thinking problems at the start, the researchers pinpointed 495 participants who developed cognitive impairment during the course of the study. These participants were then compared with 587 people who did not have any cognitive difficulties. The results show that those with blood type AB made up 6 percent of the group that developed cognitive impairment, compared with only 4 percent found in the population.
The team also found that people with higher levels of the blood protein “factor VIII” were 24 percent more likely to develop thinking and memory problems. Those with type AB blood were noted to have higher levels of this protein, too.