Table 2.
Procedural characteristics
| Characteristic | Before propensity score weighting | After propensity score weighting | ||||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Off-hours group (n = 3,119) | On-hours group (n = 2,245) | p value | Off-hours group (n = 4,758) | On-hours group (n = 4,773) | p value | |
| Transfemoral approach | 2,280 (73.1) | 1,684 (75.0) | 0.116 | 3,565 (74.9) | 3,577 (75.0) | 0.978 |
|
| ||||||
| Use of GPIIb/IIIa inhibitor | 645 (20.7) | 511 (22.8) | 0.067 | 1,021 (21.5) | 1,019 (21.4) | 0.930 |
|
| ||||||
| Use of thrombus aspiration | 1157 (37.1) | 831 (37.0) | 0.952 | 1,768 (37.2) | 1,776 (37.2) | 0.971 |
|
| ||||||
| Image-guided PCI (OCT or IVUS) | 611 (19.6) | 454 (20.2) | 0.566 | 947 (19.9) | 947 (19.8) | 0.958 |
|
| ||||||
| Preprocedural TIMI flow grade 0–I | 2,326 (74.6) | 1,662 (74.0) | 0.653 | 3,544 (74.5) | 3,557 (74.5) | 0.975 |
|
| ||||||
| Infarct-related artery (culprit vessel) | 0.078 | 0.356 | ||||
|
| ||||||
| LMCA | 28 (0.9) | 29 (1.3) | 42 (0.9) | 68 (1.4) | ||
|
| ||||||
| LAD | 1,640 (52.6) | 1,120 (49.9) | 2,503 (52.6) | 2,464 (51.6) | ||
|
| ||||||
| LCX | 298 (9.6) | 203 (9.0) | 428 (9.0) | 435 (9.1) | ||
|
| ||||||
| RCA | 1,153 (37.0) | 893 (39.8) | 1,786 (37.5) | 1,806 (37.8) | ||
Values are presented as number (%).
GPIIb/IIIa, glycoprotein IIb/IIIa; PCI, percutaneous coronary intervention; OCT, optical coherence tomography; IVUS, intravascular ultrasound; TIMI, Thrombolysis in Myocardial Infarction; LMCA, left main coronary artery; LAD, left anterior descending coronary artery; LCX, left circumflex coronary artery; RCA, right coronary artery.