New research suggests that if you have a sibling who has had a stroke, your risk of having one may be at least 60 per cent higher.

According to Swedish researchers, if your sibling had a stroke at age 55 or younger, your risk of having a stroke during the same age bracket is nearly double.

But the researchers note the increased risk may not be entirely due to genetics, and that similar lifestyle habits within families may have an influence.

The study is reported in the American Heart Association journal Circulation: Cardiovascular Genetics.