Table 1 Baseline characteristics of the study cohorts
Characteristics | Overall (n = 1937) | Low | High | P value |
|---|---|---|---|---|
(n = 960) | (n = 977) | |||
Age, years | 64.0 ± 10.8 | 65.0 ± 10.7 | 63.0 ± 10.8 | < 0.001 |
Male, n(%) | 1475 (76.1) | 702 (73.1) | 773 (79.1) | 0.002 |
Smoking, n(%) | 738 (38.1) | 361 (37.6) | 377 (38.6) | 0.656 |
Drinking, n(%) | 93 (4.8) | 57 (5.9) | 42 (4.3) | 0.121 |
Systolic BP, mmHg | 134.0 ± 24.6 | 134.6 ± 24.6 | 133.6 ± 24.7 | 0.400 |
Previous MI, n(%) | 50 (2.6) | 30 (3.1) | 19 (1.9) | 0.098 |
Hypertension, n(%) | 1066 (55.0) | 523 (54.5) | 543 (55.6) | 0.627 |
Dyslipidemia, n(%) | 704 (36.3) | 254 (26.5) | 450 (46.1) | <  0.001 |
Diabetes mellitus, n(%) | 552 (28.5) | 262 (27.3) | 290 (29.7) | 0.244 |
LV ejection fraction, (%) | 56.3 ± 9.6 | 56.4 ± 9.2 | 56.3 ± 10.0 | 0.836 |
Clinical presentation | ||||
 Unstable angina, n(%) | 598 (30.9) | 277 (28.9) | 321 (32.9) | 0.062 |
 NSTEMI, n(%) | 320 (16.5) | 144 (15.0) | 176 (18.0) | 0.076 |
 STEMI, n(%) | 1022 (52.8) | 542 (56.5) | 480 (49.1) | 0.001 |
Number of vessels | ||||
 Single, n(%) | 1119 (57.8) | 539 (56.1) | 580 (59.4) | 0.154 |
 Double, n(%) | 473 (24.4) | 243 (25.3) | 230 (23.5) | 0.369 |
 Triple, n(%) | 345 (17.8) | 178 (18.5) | 167 (17.1) | 0.407 |
Stent diameter, mm | 3.13 ± 0.45 | 3.13 ± 0.44 | 3.13 ± 0.46 | 0.833 |
Stent length, mm | 34.87 ± 13.88 | 35.45 ± 13.22 | 34.31 ± 14.46 | 0.070 |
Medications | ||||
 Aspirin | 1737 (89.7) | 868 (90.4) | 869 (88.9) | 0.297 |
 Clopidogrel | 1728 (89.2) | 868 (90.4) | 860 (88.0) | 0.093 |
 ACEI/ARB, n(%) | 1597 (82.4) | 787 (82.0) | 810 (82.9) | 0.592 |
 β-blocker, n(%) | 1603 (82.8) | 782 (81.5) | 821 (84.0) | 0.149 |
 PPI, n(%) | 1351 (68.7) | 686 (71.5) | 665 (68.1) | 0.113 |
 Calcium blockers, n(%) | 269 (13.9) | 132 (13.8) | 137 (14.0) | 0.862 |
Laboratory parameters | ||||
 TC, mmol/L | 1.96 ± 1.50 | 1.95 ± 1.84 | 1.97 ± 1.06 | 0.751 |
 TG, mmol/L | 4.94 ± 1.23 | 4.55 ± 1.22 | 5.31 ± 1.24 | <  0.001 |
 LDL-C, rmmol/L | 3.07 ± 0.97 | 2.49 ± 0.67 | 3.65 ± 0.88 | <  0.001 |
 HDL-C, mmol/L | 1.18 ± 0.42 | 1.32 ± 0.52 | 1.04 ± 0.21 | <  0.001 |
 Hemoglobin, g/L | 134.80 ± 27.66 | 131.20 ± 19.01 | 138.30 ± 33.73 | <  0.001 |
 Platelet, ×109/L | 232.00 ± 75.52 | 226.10 ± 79.21 | 237.80 ± 71.28 | <  0.001 |