Table 1. Patient characteristics among different collateral grading.
| Werner’s CC grading | Rentrop grading | ||||||
| Grade 2 (n = 686) |
Grade 0–1 (n = 1766) |
P-value | Grade 3 (n = 1145) |
Grade 0–2 (n = 1307) |
P-value | ||
| Data are presented as means ± SD or n (%). CC: collateral circulation. | |||||||
| Age, yrs | 56.9 ± 10.4 | 57.5 ± 10.4 | 0.21 | 57.3 ± 10.3 | 57.3 ± 10.5 | 0.87 | |
| Male | 573 (83.5%) | 1464 (82.9%) | 0.60 | 959 (83.8%) | 1078 (82.5%) | 0.42 | |
| Body mass index, kg/m2 | 26.6 ± 3.3 | 26.4 ± 3.3 | 0.44 | 26.4 ± 3.1 | 26.5 ± 3.4 | 0.71 | |
| Hypertension | 440 (64.1%) | 1160 (65.7%) | 0.48 | 744 (65.0%) | 856 (65.5%) | 0.80 | |
| Diabetes mellitus | 199 (29.0%) | 579 (32.8%) | 0.07 | 355 (31.0%) | 423 (32.4%) | 0.49 | |
| Hypercholesterolemia | 586 (85.4%) | 1485 (84.1%) | 0.46 | 954 (83.3%) | 1117 (85.5%) | 0.15 | |
| Prior myocardial infarction | 238 (34.7%) | 755 (42.8%) | < 0.001 | 385 (33.6%) | 608 (46.4%) | < 0.001 | |
| Prior percutaneous coronary intervention | 56 (8.2%) | 178 (10.1%) | 0.17 | 82 (7.2%) | 152 (11.6%) | < 0.001 | |
| Prior coronary artery bypass grafting | 17 (2.5%) | 58 (3.3%) | 0.36 | 19 (1.7%) | 56 (4.3%) | < 0.001 | |
| Current smoker | 308 (44.9%) | 689 (39.0%) | 0.008 | 459 (40.1%) | 538 (41.2%) | 0.59 | |
| Family history of coronary artery disease | 93 (13.6%) | 200 (11.3%) | 0.13 | 126 (11.0%) | 167 (12.8%) | 0.19 | |
| History of stoke | 48 (7.0%) | 154 (8.7%) | 0.19 | 94 (8.2%) | 108 (8.3%) | 1.00 | |
| Creatinine clearance < 60 mL/min | 53 (8.0%) | 164 (9.6%) | 0.24 | 100 (9.0%) | 117 (9.3%) | 0.78 | |
| Left ventricular ejection fraction, % | 61.5 ± 7.5 | 60.2 ± 8.1 | < 0.001 | 61.5 ± 7.4 | 59.7 ± 8.3 | < 0.001 | |
| ≤ 40% | 21 (3.1%) | 62 (3.5%) | 0.62 | 30 (2.6%) | 53 (4.1%) | 0.06 | |