Supplemental Table 2. Subgroup analysis of STEMI patients regarding vascular complexity.
| Variables | Simple vascular lesion (SI ≤ 10) | Complex vascular lesion (SI > 10) | ||||
| BID ≤ 9 times (N = 98) | BID > 9 times (N = 34) | p | BID ≤ 9 times (N = 41) | BID > 9 times (N = 33) | p | |
| Age (years) | 64 (54-78) | 67 (59-77) | 0.465 | 66 (55-88) | 64 (57-76) | 0.948 |
| Body mass index (kg/m2) | 22.1 (24.8-27.1) | 23.7 (22.0-26.5) | 0.297 | 24.8 (22.5-27.6) | 24.7 (22.23-26.6) | 0.826 |
| Creatinine (mg/dl) | 1.1 (0.9-1.5)0 | 1.1 (0.9-1.8)0 | 0.791 | 1.1 (0.9-1.8)0 | 1.0 (0.8-1.3) | 0.469 |
| Hemoglobin (g/dl) | 14.5 (12.6-15.4) | 14 (12.0-14.8) | 0.364 | 14.0 (12.0-14.8) | 13.0 (10.7-16.0) | 0.364 |
| CAD risk factors | ||||||
| Male | 25 (25.5) | 10 (29.4) | 0.658 | 9 (22.0) | 12 (36.4) | 0.202 |
| Current/past smoker | 52 (53.1) | 13 (38.2) | 0.273 | 21 (51.2) | 13 (39.4) | 0.354 |
| Hypertension | 68 (69.4) | 27 (79.4) | 0.374 | 27 (65.9) | 33 (100.0) | 0.805 |
| Diabetes | 47 (48.0) | 15 (44.1) | 0.694 | 16 (39.0) | 18 (54.5) | 0.242 |
| Hyperlipidemia | 29 (29.6) | 6 (17.6) | 0.257 | 12 (29.3) | 8 (24.2) | 0.793 |
| Known CAD | 14 (14.3) | 5 (14.7) | 1.000 | 6 (14.6) | 7 (21.2) | 0.545 |
| Previous MI | 5 (5.1) | 0 (0) | 0.325 | 1 (2.4) | 4 (12.1) | 0.172 |
| Ischemic stroke | 13 (13.3) | 5 (14.7) | 0.709 | 2 (4.9) | 3 (9.1) | 0.651 |
| Killip class | ||||||
| I | 39 (39.8) | 13 (38.2) | 1.000 | 16 (39.0) | 10 (30.3) | 0.472 |
| II | 29 (29.6) | 14 (41.2) | 0.288 | 12 (29.3) | 8 (24.2) | 0.793 |
| III | 3 (3.1) | 2 (5.9) | 0.603 | 5 (12.2) | 7 (21.2) | 0.352 |
| IV | 26 (26.5) | 4 (11.8) | 0.097 | 8 (19.5) | 8 (24.2) | 0.777 |
| Mehran risk score | ||||||
| Hypotension | 26 (26.5) | 4 (11.8) | 0.097 | 8 (19.5) | 8 (24.2) | 0.777 |
| IABP support | 20 (20.4) | 12 (35.3) | 0.104 | 19 (46.3) | 10 (30.3) | 0.231 |
| Congestive heart failure | 3 (3.1) | 2 (5.9) | 0.603 | 4 (9.8) | 7 (21.2) | 0.201 |
| Age > 75 (years) | 29 (29.6) | 11 (32.4) | 0.829 | 14 (34.1) | 10 (30.3) | 0.805 |
| Anemia | 26 (26.5) | 8 (23.5) | 0.823 | 16 (39.0) | 15 (45.5) | 0.640 |
| Procedural characteristics | ||||||
| Numbers of BID performed | 6 (4-7) | 13 (12-17) | < 0.001 | 6 (14-8) | 16 (12-19) | < 0.001 |
| Contrast volume (ml) | 160 (150-200) | 200 (160-260) | < 0.001 | 150 (150-200) | 230 (180-268) | < 0.001 |
| Fluoroscopy times (min)* | 11.3 (8.9-14.7) | 18.3 (14.1-26.1) | < 0.001 | 10.5 (8.7-13.1) | 19.7 (12.9-21.4) | < 0.001 |
| Door-to-balloon time (min) | 74 (59-108) | 81 (64-126) | 0.341 | 75 (60-110) | 81 (63-112) | 0.341 |
| Trans-femoral approach | 89 (90.8) | 28 (82.4) | 0.212 | 40 (97.6) | 27 (81.8) | 0.040 |
| Thrombus aspiration | 64 (65.3) | 14 (41.2) | 0.016 | 22 (53.7) | 16 (48.5) | 0.815 |
| Glycoprotein IIb/IIIa inhibitor | 64 (65.3) | 24 (70.6) | 0.675 | 19 (46.3) | 15 (45.5) | 1.000 |
| IABP support | 17 (17.3) | 10 (29.4) | 0.145 | 17 (41.5) | 9 (27.3) | 0.230 |
| Multiple-vessel disease | 65 (66.3) | 32 (94.1) | 0.001 | 28 (68.3) | 25 (75.8) | 0.606 |
| Infarct-related artery | ||||||
| LAD | 33 (33.7) | 3 (8.8) | 0.006 | 34 (82.9) | 26 (78.8) | 0.768 |
| LM | 0 (0) | 0 (0) | 1.000 | 1 (2.4) | 1 (3.0) | 1.000 |
| Stent implantation# | 83 (84.7) | 33 (97.1) | 0.069 | 35 (85.4) | 32 (97.0) | 0.296 |
| Bare-metal stent | 77 (78.6) | 29 (85.3) | 0.463 | 33 (80.5) | 27 (81.8) | 1.000 |
| Drug-eluting stent | 6 (6.1) | 4 (11.8) | 0.280 | 2 (4.9) | 5 (15.2) | 0.267 |
| Number of stent implantations | ||||||
| 1 | 70 (71.4) | 10 (29.4) | < 0.001 | 25 (61.0) | 12 (36.4) | 0.061 |
| 2 | 13 (13.3) | 14 (41.2) | 0.001 | 9 (22.0) | 13 (39.4) | 0.128 |
| 3 | 0 (0) | 8 (23.5) | < 0.001 | 1 (2.4) | 5 (15.2) | 0.083 |
| 4 | 0 (0) | 1 (2.9) | 0.258 | 0 (0) | 2 (6.1) | 0.195 |
| Initial TIMI flow | ||||||
| 0 | 72 (73.5) | 16 (47.1) | 0.011 | 35 (85.4) | 23 (69.7) | 0.155 |
| 1 | 6 (6.1) | 5 (14.7) | 0.150 | 2 (4.9) | 2 (6.1) | 1.000 |
| 2~3 | 20 (20.4) | 13 (38.2) | 0.064 | 4 (9.8) | 8 (24.2) | 0.119 |
| Final TIMI flow | ||||||
| 0 | 3 (3.1) | 0 (0) | 0.569 | 0 (0) | 0 (0) | - |
| 1 | 1 (1.0) | 0 (0) | 1.000 | 1 (2.4) | 0 (0) | 1.000 |
| 2~3 | 94 (95.9) | 34 (100). | 0.327 | 40 (97.6) | 33 (100.0) | 1.000 |
| PCI to non-IRA | 2 (2.0) | 2 (5.9) | 0.276 | 1 (2.4) | 1 (3.0) | 1.000 |
| Heavy calcification of IRA | 13 (13.3) | 3 (8.8) | 0.761 | 10 (24.4) | 7 (21.2) | 0.788 |
| IRA lesion > 20 mm | 78 (79.6) | 30 (88.2) | 0.433 | 37 (90.2) | 28 (84.8) | 0.501 |
| Bifurcation lesion of IRA | 52 (53.1) | 17 (50.0) | 0.918 | 37 (90.2) | 29 (87.9) | 0.914 |
| Side branch > 1.5 mm | 23 (23.5) | 8 (23.5) | 31 (75.6) | 25 (75.8) | ||
| Side branch < 1.5 mm | 29 (29.6) | 9 (26.5) | 6 (14.6) | 4 (12.1) | ||
| Periprocedural complications | ||||||
| Any dissection | 43 (43.9) | 16 (47.1) | 0.843 | 26 (63.4) | 20 (60.6) | 0.815 |
| Type D dissection | 5 (5.1) | 2 (5.9) | 1.000 | 2 (4.9) | 3 (9.1) | 0.651 |
| Type F dissection | 8 (8.2) | 3 (8.8) | 1.000 | 4 (9.8) | 3 (9.1) | 1.000 |
| Outcome | ||||||
| CIAKI | 4 (4.1) | 4 (11.8) | 0.203 | 6 (14.6) | 9 (27.3) | 0.246 |