The invention discloses a method by which the health care professional or patient may draw upon historical medical data concerning patients similarly situated in medical condition, to assist him/her in deciding on a clinical intervention procedure to select. This method is specifically tailored to the patient, as data is provided and evaluated from only similarly situated patients, and provides an expectation of potential outcome of the patient should one or the other of the options be selected. The invention further provides a database that may be used in order to provide this comparison based evaluation method. A computer based software system is further disclosed that implements the method. The invention more speiocifically provides a method by which a post-coronary event patient may make an informed decision of which post-coronary revascularization procedure to undergo in the future management of his disease. This method employs the patient's health status date (symptoms, function and quality of life), and provides projections of the patient's expected survival, risk, and 1-year health status outcome from the selection of revascularization procedure, such as Coronary Artery Bypass Grafting (CABG) or Percutaneous Coronary Intervention (PCI).