Table 1.
Baseline characteristics by LVEF categories
| LVEF <40 (N = 125) | LVEF 40–44.9 (N = 163) | LVEF 45–49.9 (N = 233) | LVEF 50–54.9 (N = 495) | LVEF 55–59.9 (N = 1269) | LVEF 60–64.9 (N = 3417) | LVEF 65–69.9 (N = 2959) | LVEF ≥70 (N = 1591) | P value | |
|---|---|---|---|---|---|---|---|---|---|
| Age, years | 60.3 (11.6) | 59.5 (11.8) | 58.3 (11.2) | 57.2 (11.3) | 58.9 (10.8) | 58.5 (10.3) | 58.0 (9.9) | 58.5 (9.8) | 0.006 |
| Male sex | 101 (80.8) | 133 (81.6) | 196 (84.1) | 432 (87.3) | 1,050 (82.7) | 2,627 (76.9) | 2,224 (75.2) | 1,137 (71.5) | <0.001 |
| BMI, kg/m2 | 25.5 (3.1) | 25.9 (3.3) | 25.7 (3.3) | 26.1 (3.3) | 26.1 (3.2) | 25.9 (3.2) | 25.9 (3.1) | 25.8 (3.3) | 0.046 |
| LVEF, % | 35.8 (3.9) | 41.5 (1.5) | 46.6 (1.4) | 52.0 (1.5) | 57.3 (1.5) | 61.8 (1.6) | 66.6 (1.5) | 72.5 (2.5) | <0.001 |
| Current smoking | 78 (62.4) | 99 (60.7) | 153 (65.7) | 323 (65.3) | 808 (63.7) | 1931 (56.5) | 1,631 (55.1) | 821 (51.6) | <0.001 |
| Diabetes mellitus | 43 (34.4) | 50 (30.7) | 85 (36.5) | 162 (32.7) | 395 (31.1) | 1,050 (30.7) | 868 (29.3) | 464 (29.2) | 0.218 |
| Hypertension | 78 (62.4) | 92 (56.4) | 129 (55.4) | 280 (56.6) | 779 (61.4) | 2,199 (64.4) | 1950 (65.9) | 1,087 (68.3) | <0.001 |
| Hyperlipidaemia | 71 (56.8) | 103 (63.2) | 155 (66.5) | 314 (63.4) | 840 (66.2) | 2,298 (67.3) | 2034 (68.7) | 1,096 (68.9) | 0.023 |
| Peripheral vascular disease | 3 (2.4) | 2 (1.2) | 5 (2.1) | 11 (2.2) | 43 (3.4) | 99 (2.9) | 75 (2.5) | 34 (2.1) | 0.413 |
| Previous cerebrovascular disease | 17 (13.6) | 19 (11.7) | 21 (9.0) | 46 (9.3) | 150 (11.8) | 367 (10.7) | 309 (10.4) | 166 (10.4) | 0.663 |
| Multivessel disease | 96 (76.8) | 130 (79.8) | 181 (77.7) | 388 (78.4) | 994 (78.3) | 2,579 (75.5) | 2,174 (73.5) | 1,166 (73.3) | 0.005 |
| Left main disease | 7 (5.6) | 13 (8.0) | 11 (4.7) | 25 (5.1) | 94 (7.4) | 207 (6.1) | 174 (5.9) | 105 (6.6) | 0.407 |
| Total occlusion | 43 (34.4) | 54 (33.1) | 79 (33.9) | 171 (34.5) | 313 (24.7) | 574 (16.8) | 392 (13.2) | 174 (10.9) | <0.001 |
| Lesion length, mm | 30.1 (19.8) | 29.9 (17.9) | 31.1 (19.0) | 32.2 (19.5) | 29.7 (20.0) | 29.0 (21.0) | 28.5 (18.3) | 27.5 (16.6) | <0.001 |
| Moderate to severe calcification | 23 (18.4) | 31 (19.0) | 43 (18.5) | 85 (17.2) | 212 (16.7) | 532 (15.6) | 454 (15.3) | 236 (14.8) | 0.5 |
| Baseline TIMI 3 | 67 (53.6) | 82 (50.3) | 112 (48.1) | 252 (50.9) | 777 (61.2) | 2,354 (68.9) | 2,157 (72.9) | 1,202 (75.5) | <0.001 |
| ACS presentation | 80 (64.0) | 101 (62.0) | 158 (67.8) | 345 (69.7) | 844 (66.5) | 2,144 (62.7) | 1771 (59.9) | 925 (58.1) | <0.001 |
| PCI duration, min | 38.2 (28.4) | 36.6 (26.6) | 41.0 (34.6) | 40.9 (36.1) | 37.7 (33.0) | 35.0 (30.3) | 34.4 (32.8) | 32.2 (25.7) | <0.001 |
| Successful revascularization | 118 (94.4) | 159 (97.5) | 225 (96.6) | 473 (95.6) | 1,231 (97.0) | 3,337 (97.7) | 2,872 (97.1) | 1,555 (97.7) | 0.055 |
BMI, body mass index; LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention; TIMI, thrombolysis in myocardial infarction.
Continuous variables were presented as the mean with standard deviation. Categorical characteristics were described as counts with percentages.