Married women have a lower risk of dying from heart disease than unmarried women, a new study states. 

Researchers looked at health data from more than 730,000 women for the BMC Medicine study. None of the women had previously been diagnosed with heart disease, cancer or stroke. Researchers studied the risk of being hospitalized or dying from heart disease of married women and compared it to that of unmarried women. 

Over a more than eight year time period, almost 31,000 women were admitted to the hospital or died because of ischemic heart disease. 

Researchers found that married women's risk of dying from heart disease was 28 percent lower than unmarried women -- which included women who were single, divorced or widowed. The findings held true even when considering outside factors such as race or socio-economic group. 

However, the risk of developing heart disease in the first place seems to be the same between married and unmarried women, the study showed.