Event rates at long-term follow-up
| GOODCOLL (n=162) | POORCOLL (n=140) | P values | |
| All-cause death | 8 (5%) | 13 (9%) | 0.174 |
| Composite MACE | 16 (10%) | 20 (14%) | 0.286 |
| Cardiac death | 4 (3%) | 5 (4%) | 0.738 |
| All MI | 9 (6%) | 16 (11%) | 0.092 |
| CABG | 4 (3%) | 4 (3%) | 1.000 |
CABG, coronary artery bypass grafting; CTO, coronary chronic total occlusion; GOODCOLL, well-developed collaterals to the CTO; MACE, major adverse cardiac events; MI, myocardial infarction; POORCOLL, poorly developed collaterals to the CTO.