The present invention is related to the effectiveness of aspirin with age of person suffering from coronary heart disease. One of major cause which was observed in selected groups of patients was smoking. The age group distribution with persons who were selected for aspirin treatment who were actually has coronary heart diseases. A good comparison was established between aspirin treatment and before aspirin treatment in all five groups of patients which were divided on basis of their ages. The risk factor which is associated with such kind of treatment was also considered. Over all it has been proved that aspirin has been effective for the majority of the age groups studied, all of whom had at the beginning of the study, coronary heart disease. Clearly, aspirin benefited 110 patients in the trial. For the remaining 40, in the age group 65-69 the results were not favorable for the use of aspirin.