A new study discovered a connection between an individual’s blood type and the possibility of experiencing a severe cardiovascular problem. According to researchers, people with a non-O blood type have a higher risk of heart attack and stroke. This analysis was made with the help of more than 1.3 million participants.
Just a correlation, not cause-and-effect
The paper, presented last week at the annual European Society of Cardiology Congress, showed that people who have blood types different than O- or O+ exhibit a risk of stroke and heart attack higher by 9 percent. However, the researchers did not find a clear cause of this connection. Thus, they did not observe a cause-and-effect case; they only noticed there was a correlation.
In the US, the O blood types are the most common. More than 45 percent of US people have O- or O+. Besides a higher heart attack risk, previous research linked A blood types to a predisposition of having higher cholesterol levels than the other blood types. Again, this study also represented a correlation. In fact, all studies which looked at blood types and heart problems were merely correlations and not cause-and-effect instances.
— European Cardiology (@escardio) April 30, 2017
Non-O blood type increase the risk of heart problems
The research was performed by a team of Dutch scientists. They collected data on 1.3 million people, which was gathered in 11 studies. From all these individuals, 519,743 had type O blood. Researchers observed how the incidence of strokes and heart attacks among these people was smaller. Namely, 14 out of 1000 people with type O blood experienced a heart attack or a stroke.
Among the people with non-O blood types, they observed how 15 out of 1000 suffered a cardiovascular event. This indicates that people with a blood type different than O are 9 percent more likely to suffer from severe heart problems. It is a small risk increase but it makes a great difference when applied to the entire population.
What is your opinion about this study? Do you think blood types influences our health or is the data based on mere coincidences? What is your blood type?
Image source: Pixabay