People with 'AB' and women with 'B' were more likely to suffer a stroke than people with 'O' blood group, according to Brigham's Dr. Lu Qi.
The observational study looked at 90,000 men and women over 20-years. It was seen that men and women with AB had a 26% higher risk of stroke compared to those with type O. Women but not men with B group had a 15% greater risk compared to those with O.
Proteins on the surface of red blood cells (RBC's) determine a person's blood group. Certain blood types may make the RBC's more likely to clump together and stick to the lining of blood vessels, which could be the possible reason for the blood
clot and hence the stroke.
The study was presented at the American Heart Association conference.