HEALTH TOPICS 
The higher your chances of having a heart attack or ischemic stroke, the more important it is to take aspirin every day; the lower your chances, the less important it is. Several online calculators have been developed to help estimate your odds.
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The most commonly used heart attack calculator was developed by the Framingham Heart Study. A good one is the risk assessment tool made available by the National Heart, Lung, and Blood Institute.
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The newer Reynolds Risk Score, one for men and one for women, includes the Framingham variables plus family history and level of C-reactive protein.
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The most comprehensive is the heart disease section of Your Disease Risk, originated at the Harvard School of Public Health and now hosted by Washington University School of Medicine.
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