Researchers are puzzled by a new study on heart attack risks.
It analyzed the number of heart attack hospitalizations among people between the ages of 35 and 54.
The overall proportion of hospitalizations for that relatively young group increased from 1995 to 2014.
But in terms of percentages, the increase was greatest with women.
One researcher says it was a surprise that an increasing number of heart attacks are happening to younger patients and they don’t know why the surge appears to be affecting women more than men.
The study, published in the journal “Circulation”, had some limitations.
It used information from only four communities in the US and did not account for risk factors such as obesity.