A new study reveals a person's risk for having a heart attack, and dying of one, is linked to lower socioeconomic status.<br />According to UPI, lower socioeconomic status is exemplified by a lack of resources for safe housing, nutritious food, and access to healthcare.<br />Contributory factors to heart disease include smoking, high blood pressure and diabetes. They account for roughly 40% of the increased risk.<br />However, researchers reported the remaining 60% was attributable to 'other factors' associated with lower socioeconomic status.<br />The new analysis estimates that more than 31.2 million adults in the United States have low socioeconomic status.<br />For the study, this was defined as household income $12,760 for a household of one -- or educational level less than high school.