Percentage of patients interrupting exercise at each step of the Bruce protocol and at each time during the follow up period
| Step | Before PTE | 3 months | 1 year | 2 years |
|---|---|---|---|---|
| 0 | 44% | 21% | 18% | 4% |
| 0.5 | 50% | 4% | 25% | 22% |
| 1 | 6% | 42% | 4% | 17% |
| 2 | 0% | 21% | 29% | 26% |
| 3 | 0% | 4% | 14% | 13% |
| 4 | 0% | 8% | 10% | 18% |