Older patients could not exercise as hard as younger patients and were more likely to have abnormalities in the electrical activity of the heart during an exercise test. Six years after the test, 92% of younger patients and 63% of older patients were alive. In addition, 95% of younger patients had had no heart attack, heart-related death, or heart failure compared with only 66% of the older patients. Workload was the only measure that predicted bad heart-related events. The relation between workload and outcome was similar in older and younger patients, even after accounting for other risk factors for heart disease such as smoking and cholesterol levels.