Table 1.
Baseline patient characteristics.
| Before PSM | After PSM | |||||
|---|---|---|---|---|---|---|
| LMCA | Non-LMCA | p value | LMCA | Non-LMCA | p value | |
| (n = 155) | (n = 6274) | (n = 150) | (n = 150) | |||
| Age | 61.91 ± 9.80 | 58.29 ± 10.41 | <0.001 | 61.96 ± 9.68 | 60.97 ± 11.02 | 0.411 |
|
| ||||||
| Female, n (%) | 40 (25.8) | 1452 (23.1) | 0.438 | 39 (26.0) | 41 (27.3) | 0.794 |
|
| ||||||
| Body mass index, kg/m2 | 25.58 ± 2.98 | 25.89 ± 3.20 | 0.233 | 25.64 ± 2.98 | 25.41 ± 3.58 | 0.545 |
|
| ||||||
| Risk factors and history, n (%) | ||||||
| Smoker | 89 (57.4) | 3755 (59.9) | 0.542 | 86 (57.3) | 79 (52.7) | 0.417 |
| Diabetes | 56 (36.1) | 1791 (28.5) | 0.039 | 55 (36.7) | 52 (34.7) | 0.718 |
| Hypertension | 92 (59.4) | 3993 (63.6) | 0.273 | 89 (59.3) | 95 (63.3) | 0.477 |
| Hyperlipidemia | 101 (65.2) | 4125 (65.7) | 0.879 | 98 (65.3) | 105 (70.0) | 0.388 |
| Prior myocardial infarction | 27 (17.4) | 828 (13.2) | 0.126 | 26 (17.3) | 18 (12.0) | 0.192 |
| Prior stroke | 20 (12.9) | 674 (10.7) | 0.392 | 19 (12.7) | 19 (12.7) | 1.000 |
|
| ||||||
| Laboratory tests | ||||||
| Leukocyte, ×109/L | 7.22 ± 1.97 | 7.08 ± 2.10 | 0.430 | 7.22 ± 1.97 | 7.27 ± 2.21 | 0.828 |
| Platelet, ×109/L | 209.97 ± 59.71 | 208.51 ± 57.02 | 0.757 | 209.97 ± 59.71 | 211.13 ± 58.61 | 0.865 |
| Hemoglobin, g/L | 134.16 ± 14.73 | 140.83 ± 16.15 | <0.001 | 134.16 ± 14.73 | 134.73 ± 15.71 | 0.745 |
| Creatinine, μmol/L | 76.55 ± 18.90 | 76.03 ± 16.41 | 0.697 | 76.40 ± 18.94 | 76.95 ± 17.96 | 0.046 |
| GFR, ml/min | 87.71 ± 16.22 | 91.03 ± 15.54 | 0.009 | 87.79 ± 16.36 | 88.29 ± 17.44 | 0.799 |
| LVEF, % | 62.82 ± 6.95 | 62.28 ± 7.46 | 0.375 | 62.96 ± 6.85 | 60.83 ± 9.48 | 0.028 |
|
| ||||||
| Clinical presentation | ||||||
| STEMI | 24 (15.5) | 1421 (22.6) | 0.035 | 23 (15.3) | 36 (24.0) | 0.059 |
| NSTEMI | 11 (7.1) | 464 (7.4) | 0.888 | 10 (6.7) | 12 (8.0) | 0.658 |
| UA | 120 (77.4) | 4389 (70.0) | 0.045 | 117 (78.0) | 102 (68.0) | 0.051 |
|
| ||||||
| Medication at discharge, n (%) | ||||||
| Aspirin | 154 (99.4) | 6185 (98.6) | 0.726 | 149 (99.3) | 149 (99.3) | 1.000 |
| Clopidogrel | 154 (99.4) | 6258 (99.7) | 0.340 | 149 (99.3) | 149 (99.3) | 1.000 |
| Ticagrelor | 1 (0.6) | 13 (0.2) | 0.290 | 1 (0.7) | 1 (0.7) | 1.000 |
| β-blockers | 146 (94.2) | 5575 (88.9) | 0.036 | 142 (94.7) | 141 (94.0) | 0.803 |
| Calcium channel blockers | 80 (51.6) | 3121 (49.7) | 0.646 | 76 (50.7) | 68 (45.3) | 0.355 |
| Nitrates | 154 (99.4) | 6141 (97.9) | 0.382 | 149 (99.3) | 147 (98.0) | 0.622 |
| Statins | 150 (96.8) | 6011 (95.8) | 0.552 | 146 (95.3) | 140 (93.3) | 0.169 |
Values are mean ± SD or n (%). GFR = glomerular filtration rate; LVEF = left ventricular ejection fraction; STEMI = ST elevation myocardial infarction; NSTEMI = non-ST elevation myocardial infarction; UA = unstable angina.