Table 4. Procedural characteristics in propensity score matched populations according to different statin initiation timing.
| Variables | Model 1 (group I vs. II or III) | Model 2 (group I or II vs. III) | Model 3 (group I vs. II) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| <24 hours (n=1,248) | ≥24 hours (n=1,248) | p value | <48 hours (n=768) | ≥48 hours (n=768) | p value | <24 hours (n=476) | 24–48 hours (n=476) | p value | ||
| Infarct-related artery | ||||||||||
| Left anterior descending | 573 (45.9) | 559 (44.8) | 0.572 | 352 (45.8) | 357 (46.5) | 0.798 | 217 (45.6) | 199 (41.8) | 0.240 | |
| Right coronary artery | 445 (35.7) | 449 (36.0) | 0.867 | 264 (34.4) | 263 (34.2) | 0.957 | 180 (37.8) | 185 (38.9) | 0.739 | |
| Left circumflex artery | 208 (16.7) | 220 (17.6) | 0.524 | 135 (17.6) | 136 (17.7) | 0.947 | 72 (15.1) | 84 (17.6) | 0.293 | |
| Left main coronary artery | 22 (1.8) | 20 (1.6) | 0.756 | 17 (2.2) | 12 (1.6) | 0.349 | 7 (1.5) | 8 (1.7) | 0.795 | |
| Multivessel disease | 671 (53.8) | 672 (53.8) | 0.968 | 411 (53.5) | 435 (56.6) | 0.218 | 230 (48.3) | 234 (49.2) | 0.795 | |
| ACC/AHA B2/C lesion | 972 (77.9) | 969 (77.6) | 0.885 | 607 (79.0) | 599 (78.0) | 0.619 | 368 (77.3) | 366 (76.9) | 0.877 | |
| Pre-PCI TIMI flow 0 | 510 (40.9) | 475 (38.1) | 0.152 | 301 (39.2) | 281 (36.6) | 0.293 | 217 (45.6) | 194 (40.8) | 0.132 | |
| Coronary stenting | 1,219 (97.7) | 1,221 (97.8) | 0.787 | 753 (98.0) | 753 (98.0) | 1.000 | 465 (97.7) | 463 (97.3) | 0.679 | |
| Total No. of stents | 1.69±0.94 | 1.67±0.90 | 0.645 | 1.70±0.94 | 1.71±0.92 | 0.854 | 1.58±0.86 | 1.60±0.87 | 0.625 | |
| Total stent length (mm) | 31 (23–48) | 30 (23–49) | 0.473 | 30 (20–49) | 32 (21–51) | 0.924 | 28 (20–47) | 28 (23–48) | 0.762 | |
| Mean stent diameter (mm) | 3.19±0.39 | 3.18±0.41 | 0.240 | 3.19±0.39 | 3.18±0.42 | 0.860 | 3.18±0.41 | 3.18±0.41 | 0.900 | |
| Use of IVUS | 323 (25.9) | 332 (26.6) | 0.682 | 201 (26.2) | 194 (25.3) | 0.683 | 141 (29.6) | 137 (28.8) | 0.776 | |
| Post-PCI TIMI flow 3 | 1,175 (94.2) | 1,165 (93.3) | 0.408 | 717 (93.4) | 719 (93.6) | 0.836 | 448 (94.1) | 443 (93.1) | 0.508 | |
| Procedural complications | ||||||||||
| Periprocedural shock | 39 (3.1) | 54 (4.3) | 0.113 | 22 (2.9) | 29 (3.8) | 0.319 | 16 (3.4) | 25 (5.3) | 0.151 | |
| No-reflow phenomenon | 65 (5.2) | 62 (5.0) | 0.785 | 36 (4.7) | 36 (4.7) | 1.000 | 22 (4.6) | 27 (5.7) | 0.463 | |
| VT or VF | 22 (1.8) | 29 (2.3) | 0.322 | 14 (1.8) | 16 (2.1) | 0.712 | 7 (1.5) | 10 (2.1) | 0.463 | |
| Use of IABP | 54 (4.3) | 65 (5.2) | 0.301 | 31 (4.0) | 37 (4.8) | 0.457 | 19 (4.0) | 24 (5.0) | 0.435 | |
| Thrombi aspiration | 60 (4.8) | 68 (5.4) | 0.468 | 29 (3.8) | 43 (5.6) | 0.091 | 23 (4.8) | 25 (5.3) | 0.767 | |
Values are presented as mean±standard deviation, median (interquartile range) or number (percentage).
ACC = American College of Cardiology; AHA = American Heart Association; IABP = intra-aortic balloon pump; IVUS = intravascular ultrasound; PCI = percutaneous coronary intervention; TIMI = thrombolysis in myocardial infarction; VF = ventricular fibrillation; VT = ventricular tachycardia.