Table 1.
Demographic and medical history before propensity score matching.
| Characteristic | All | Pre-pandemic | During-pandemic | Post-pandemic | P |
|---|---|---|---|---|---|
| (n = 7,650) | (n = 2,252) | (n = 3,878) | (n = 1,520) | ||
| Age, years | 57.20 (9.09) | 56.64 (9.01) | 57.54 (8.98) | 57.13 (9.47) | 0.001 |
| Male, n (%) | 5,934 (77.6%) | 1,756 (77.98%) | 2,992 (77.15%) | 1,186 (78.03%) | 0.677 |
| BMI, kg/m2 | 25.8 (3.20) | 25.69 (3.16) | 25.89 (3.21) | 25.88 (3.25) | 0.040 |
| Syntax score | 10.3 (7.83) | 10.25 (7.96) | 10.40 (7.77) | 10.22 (7.78) | 0.658 |
| Medical history, n (%) | |||||
| Smoking | < 0.001 | ||||
| Never | 3,627 (47.4%) | 1,010 (44.85%) | 1,825 (47.06%) | 792 (52.11%) | |
| Former | 1,289 (16.8%) | 412 (18.29%) | 658 (16.97%) | 219 (14.41%) | |
| Active | 2,734 (35.7%) | 830 (36.86%) | 1,395 (35.97%) | 509 (33.49%) | |
| Drinking | 0.004 | ||||
| Never | 5,642 (73.8%) | 1,629 (72.34%) | 2,913 (75.12%) | 1,100 (72.37%) | |
| Former | 513 (6.71%) | 170 (7.55%) | 257 (6.63%) | 86 (5.66%) | |
| Active | 1,495 (19.5%) | 453 (20.12%) | 708 (18.26%) | 334 (21.97%) | |
| Hypertension | 4,518 (59.1%) | 1,315 (58.39%) | 2,295 (59.18%) | 908 (59.74%) | 0.696 |
| Diabetes mellitus | 2,078 (27.2%) | 576 (25.58%) | 1,070 (27.59%) | 432 (28.42%) | 0.109 |
| Previous AMI | 1,352 (17.7%) | 436 (19.36%) | 606 (15.63%) | 310 (20.39%) | < 0.001 |
| Stroke | 637 (8.33%) | 216 (9.59%) | 278 (7.17%) | 143 (9.41%) | 0.001 |
| Previous PCI | 2,839 (37.1%) | 780 (34.64%) | 1,378 (35.53%) | 681 (44.80%) | < 0.001 |
| Heart failure | 39 (0.51%) | 10 (0.44%) | 18 (0.46%) | 11 (0.72%) | 0.423 |
| Atrial fibrillation | 224 (2.93%) | 62 (2.75%) | 93 (2.40%) | 69 (4.54%) | < 0.001 |
| CKD | 34 (0.44%) | 7 (0.31%) | 15 (0.39%) | 12 (0.79%) | 0.071 |
| Arrhythmia | 272 (3.56%) | 92 (4.09%) | 107 (2.76%) | 73 (4.80%) | < 0.001 |
| Presentation | < 0.001 | ||||
| UA | 6,800 (88.9%) | 1,912 (84.91%) | 3,487 (89.92%) | 1,401 (92.17%) | |
| NSTEMI | 549 (7.18%) | 205 (9.10%) | 260 (6.70%) | 84 (5.53%) | |
| STEMI | 301 (3.92%) | 135 (5.99%) | 131 (3.38%) | 35 (2.30%) | |
| Target vessel | 0.753 | ||||
| D | 342 (4.47%) | 98 (4.35%) | 165 (4.25%) | 79 (5.20%) | |
| LAD | 3,707 (48.5%) | 1,074 (47.69%) | 1,907 (49.17%) | 726 (47.76%) | |
| LCX | 1,242 (16.2%) | 364 (16.16%) | 622 (16.04%) | 256 (16.84%) | |
| LM | 251 (3.28%) | 81 (3.60%) | 122 (3.15%) | 48 (3.16%) | |
| RCA | 2,108 (27.6%) | 635 (28.20%) | 1,062 (27.39%) | 411 (27.04%) |
Bold value indicates a statistically significant difference.
A p-values of the relationship trends of the three groups of variables are also given in the table.
Data are mean ± SD, median (interquartile range), or number (%).
Abbreviations: BMI, body mass index; LEVF, left ventricular ejection fraction; AMI, acute myocardial infarction; CKD, chronic kidney disease; UA, Unstable Angina; STEMI, ST-segment elevation myocardial infarction; NSTEMI, Non-ST-segment elevation myocardial infarction; D, diagonal branch; LAD, Left anterior descending artery; LCx, Left circumflex artery; LM, Left main trunk; RCA, Right coronary artery.