They are almost twice as likely to suffer from cognitive disorders compared to other blood groups.
If the blood group is not the same for everyone, it is because the composition of blood varies according to individuals. More precisely, the blood group depends on small proteins, called antigens, present on the surface of the red blood cells. Blood groups determine blood compatibility, essential for transfusions.
American scientists have sought to establish a link between blood group and cognitive disorders. They followed around 30,000 Americans over 45, all without problem with memory at the start. After 3 and a half years of follow -up, 495 of them have developed cognitive disorders, notably affecting memory. These subjects were compared to 587 people from a control group without cognitive disorders. Ultimately, it was found that those with a particular blood group were almost twice as likely to suffer from cognitive disorders compared to other blood groups.
Researchers also examined the blood rates of factor VIII, a protein that helps blood coagulate. Higher levels of this protein have been associated with an increased risk of 24%cognitive disorders. “In this prospective study, the blood blood group and a higher FVIII rate were associated with an increased incidence of cognitive disorders” explained scientists in the journal “Neurology”. The Blood Group AB is not very widespread in France (3% of the population). It is also less widespread than other blood groups such as O and have in most regions of the world.
“The blood group is linked to other vascular problems such as stroke, so that the results highlight the links between vascular problems and brain health” has declared Pr Mary Cushman, author of the study. This study is the first of its kind to highlight the importance of the blood group and the level of factor VIII as potential risk factors in the appearance of cognitive disorders. Although the exact mechanism behind these associations remains to be determined, the results suggest that more in -depth tests could be useful to assess the risk in individuals of the AB group or those with high levels of factor VIII.
