Duke Treadmill Score

• The Duke Treadmill Score was originally developed based on the number of minutes of exercise performed using the Bruce protocol.​

​​

• Duke Treadmill Score = [exercise duration in minutes, by Bruce protocol] – [ 5 × (maximal ST elevation or depression, in millimeters)] – [4 × (treadmill angina index)]

​

Duke treadmill scores typically range from -25 (indicating the highest risk) to +15 (indicating the lowest risk). The one-year mortality and five-year survival rates associated with these scores are as follows:

- A score of less than or equal to -11: 5.25% annual mortality rate.

- A score between -10 and 4: 1.25% annual mortality rate.

- A score of 5 or greater: 0.25% annual mortality rate.