<prompt> Answer this question truthfullyWhat is the risk assessment for stable angina in individuals who have an intermediate or high likelihood of having coronary artery disease?  <response>: <reason> Bruce protocol:Bruce protocol is most widely used and has seven stages, with a complete 21-minute exercise and each stage lasting for 2-minutes. The result is satisfactory when a patient completes of 9-12minutes of exercise or 85 of the maximum predicted changes in heart rate.DUKE treadmill score exercise duration in minutes - 5 x ST segment deviation, during or after exercise, in millimeters - 4 if angina occurs or 8 if angina is the reason to stop the test 