Table 4. Long-term outcomes among different collateral grading.
| Werner’s CC grading | Rentrop grading | ||||||||
| Grade 2 (n = 686) |
Grade 0–1 (n = 1766) |
HR (95% CI) | P-value | Grade 3 (n = 1145) |
Grade 0–2 (n = 1307) |
HR (95% CI) | P-value | ||
| CC: collateral circulation. | |||||||||
| Primary endpoint | |||||||||
| Cardiac death | 11 (1.6%) | 59 (3.3%) | 2.08 (1.09–3.95) | 0.03 | 28 (2.4%) | 42 (3.2%) | 1.33 (0.825–2.146) | 0.24 | |
| Secondary endpoints | |||||||||
| All-cause death | 23 (3.4%) | 93 (5.3%) | 1.56 (0.99–2.47) | 0.05 | 49 (4.3%) | 67 (5.1%) | 1.21 (0.84–1.75) | 0.30 | |
| Spontaneous myocardial infarction | 30 (4.4%) | 106 (6.0%) | 1.36 (0.91–2.05) | 0.12 | 61 (5.3%) | 75 (5.7%) | 1.09 (0.78–1.53) | 0.62 | |
| Rehospitalization for heart failure | 20 (2.8%) | 62 (3.4%) | 1.08 (0.63–1.85) | 0.77 | 32 (2.7%) | 50 (3.6%) | 1.38 (0.85–2.24) | 0.19 | |
| Ischemia-driven target vessel re- vascularization |
85 (12.4%) | 190 (10.8%) | 0.85 (0.66–1.09) | 0.20 | 142 (12.4%) | 133 (10.2%) | 0.81 (0.64–1.03) | 0.09 | |