Aspirin is used to deter Cardiovascular Heart Disease when gastrointestinal bleeding is not a risk.

The use of aspirin is recommended for men age 45-79 to reduce risk of myocardial infarction.

The use of aspirin is recommended for women age 55-79 to reduce risk of ischemic stroke.

The 32% of men taken aspirin reduce their chances for myocardial infarction, while women taken aspirin to reduce the risk of ischemic stroke is 17%. The use of aspirin of people over 80 is not recommended.

The benefit of men taking aspirin depends on these factors:

The benefit of women taking aspirin depends on these factors:

Risks of serious upper GI problems are about for men under the age of 60 in one in 8 in 1000.
The risk of women under 60 is 4 in 1000.
The older you are the less risk there is.