Gene variants associated with a person’s blood type may be linked to their risk of early stroke, according to a new meta-analysis published in the August 31, 2022, online issue of Neurology®, the medical journal of the American Academy of Neurology. The meta-analysis included all available data from genetic studies that included young adult ischemic stroke, which is caused by a blockage of blood flow to the brain.
“Non-O blood types have previously been linked to a risk of early stroke, but the findings of our meta-analysis showed a stronger link between these blood types with early stroke compared to late stroke, and in linking risk mostly to blood type A,” said study author Braxton D. Mitchell, PhD, MPH, of University of Maryland School of Medicine in Baltimore. “Specifically, our meta-analysis suggests that gene variants tied to blood types A and O represent nearly all of those genetically linked with early stroke. People with these gene variants may be more likely to develop blood clots, which can lead to stroke.”
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