Study examines aspirin use to prevent colorectal cancer -- ScienceDailyHennekens was the first to demonstrate that aspirin significantly reduces a first heart attack as well as recurrent heart attacks, strokes, and cardiovascular death when given within 24 hours after onset of symptoms of a heart attack as well as to a wide variety of patients who have survived a blockage in the heart, brain or legs. His landmark and first discoveries on aspirin are not limited to cardiovascular disease and include the prevention of recurrent migraine headaches. He also hypothesized from earlier observational study data that aspirin may decrease risks of colorectal cancer and delay cognitive loss as well as reduce the development of type 2 diabetes. Since then, randomized trials and their meta-analyses have indicated that aspirin prevents colorectal polyps as well as colorectal cancer. "More than 90 percent of patients diagnosed with colorectal cancer are 50 years or older. The major risk factors are similar to those for heart attacks and stroke and include overweight, obesity as well as physical inactivity, a diet low in fiber and high in fat as well as type 2 diabetes," said Lawrence Fiedler, M.D.