New research bolsters the suggestion that blood type is associated with varying levels of risk of developing coronary heart disease. But experts say the association’s potential clinical implications are not a concern.
The research found that, when compared with individuals with type O, those with type A blood have a 6% greater risk of heart disease, those with type B have a 15% greater risk, and those with type AB have a 23% greater risk. In the United States, about 44% of individuals have type O blood, 42% type A, 10% type B, and 4% type AB. The association was not changed by other known heart disease risk factors, including age, sex, alcohol consumption, smoking, physical activity, or having diabetes mellitus.
Mitka M. Blood Type Linked to Heart Disease Risk, But Clinical Significance Unlikely. JAMA. 2012;308(13):1306-1307. doi:10.1001/2012.jama.11810