Table 4. Distribution of KP3 class.
| Class A | Class B | Class C | p value | ||
|---|---|---|---|---|---|
| All | 32,329 (66.7) | 14,464 (29.9) | 1,660 (3.4) | ||
| Sex | 0.029 | ||||
| Male | 23,315 (67.1) | 10,262 (29.5) | 1,180 (3.4) | ||
| Female | 9,014 (65.8) | 4,202 (30.7) | 480 (3.5) | ||
| Age | <0.001 | ||||
| <55 | 5,964 (70.7) | 2,260 (26.8) | 215 (2.5) | ||
| 55–64 | 9,013 (66.6) | 4,086 (30.2) | 438 (3.2) | ||
| 65–74 | 9,129 (64.6) | 4,454 (31.5) | 548 (3.9) | ||
| >75 | 8,223 (66.6) | 3,664 (29.7) | 459 (3.7) | ||
| ACS | <0.001 | ||||
| No | 7,749 (56.7) | 4,263 (31.2) | 1,660 (12.1) | ||
| Yes | 24,580 (70.7) | 10,201 (29.3) | 0 (0) | ||
| Clinical diagnosis | <0.001 | ||||
| Silent ischemia | 534 (26.7) | 855 (42.7) | 612 (30.6) | ||
| Stable angina | 7,215 (61.8) | 3,408 (29.2) | 1,048 (9) | ||
| Unstable angina | 8,441 (51.4) | 7,982 (48.6) | 0 (0) | ||
| NSTEMI | 8,336 (82) | 1,827 (18) | 0 (0) | ||
| STEMI | 7,803 (95.2) | 392 (4.8) | 0 (0) | ||
| DM | <0.001 | ||||
| No | 20,932 (67.3) | 9,180 (29.5) | 972 (3.1) | ||
| Yes | 11,377 (65.6) | 5,280 (30.4) | 688 (4) | ||
| Renal failure | <0.001 | ||||
| No | 30,109 (66.6) | 13,571 (30) | 1,541 (3.4) | ||
| Yes | 2,199 (68.6) | 889 (27.7) | 119 (3.7) | ||
| Angina symptoms | <0.001 | ||||
| No symptom | 402 (33.4) | 622 (51.7) | 180 (15) | ||
| CCS class 1–2 | 5,251 (62.8) | 2,267 (27.1) | 868 (10.4) | ||
| CCS class 3–4 | 1,562 (75.1) | 519 (24.9) | 0 (0) | ||
| Noninvasive stress test | <0.001 | ||||
| Not done or negative | 29,397 (66.3) | 13,258 (29.9) | 1,660 (3.7) | ||
| Positive | 2,932 (70.8) | 1,206 (29.1) | 0 (0) | ||
| Antianginal medications | <0.001 | ||||
| No | 18,472 (65.4) | 8,402 (29.7) | 1,379 (4.9) | ||
| Yes | 12,994 (68.1) | 5,812 (30.5) | 270 (1.4) | ||
| Lesion | |||||
| Left main | 1,453 (45.1) | 1,770 (54.9) | 1 (0) | <0.001 | |
| Proximal LAD | 15,010 (72.5) | 5,653 (27.3) | 34 (0.2) | <0.001 | |
| CTO | 3,705 (68.1) | 1,552 (28.5) | 184 (3.4) | <0.001 | |
| Multi-vessel disease | 17,643 (69.6) | 7,199 (28.4) | 518 (2.0) | <0.001 | |
| PCI volume | <0.001 | ||||
| Low tertile | 4,442 (67.5) | 1,939 (29.5) | 203 (3.1) | ||
| Mid tertile | 8,821 (64.7) | 4,235 (31.1) | 581 (4.3) | ||
| High tertile | 19,066 (67.5) | 8,290 (29.4) | 876 (3.1) | ||
| Geographic region | <0.001 | ||||
| Seoul | 9,705 (65.7) | 4,527 (30.7) | 532 (3.6) | ||
| Gyeonggi province | 7,775 (68) | 3,242 (28.4) | 413 (3.6) | ||
| Other provinces | 14,849 (66.7) | 6,695 (30.1) | 715 (3.2) | ||
ACS = acute coronary syndrome; CCS = Canadian Cardiovascular Society; CTO = chronic total occlusion; DM = diabetes mellitus; KP3 = Korean practice pattern of percutaneous coronary intervention; MACE = major adverse cardiovascular events; MACCE = major adverse cardiac and cerebrovascular events; NSTEMI = non-ST-elevation myocardial infarction; LAD = left anterior descending coronary artery; MI = myocardial infarction; PCI = percutaneous coronary intervention; STEMI = ST-elevation myocardial infarction.