Table 1. Patient demographics and clinical characteristics before and after PSM.
| Characteristics | Before PSM | After PSM | ||||
|---|---|---|---|---|---|---|
| IOCM (n=1,665) | LOCM (n=7,766) | p value | IOCM (n=979) | LOCM (n=979) | p value | |
| Age (years) | 67.5±10.8 | 56.3±8.9 | <0.001 | 62.7±11.0 | 62.5.3±10.5 | 0.783 |
| Male | 1,148 (68.9) | 6,127 (78.9) | <0.001 | 716 (73.1) | 755 (71.1) | 0.045 |
| Diabetes mellitus | 514 (30.9) | 2,301 (29.6) | 0.315 | 309 (31.6) | 300 (30.6) | 0.649 |
| Hyperlipidemia | 1,091 (65.5) | 5,289 (68.1) | 0.041 | 650 (66.4) | 652 (66.6) | 0.949 |
| Hypertension | 1,151 (69.1) | 4,935 (63.5) | <0.001 | 663 (67.7) | 685 (70.0) | 0.298 |
| Smoking | 829 (49.8) | 4,652 (59.9) | <0.001 | 526 (53.7) | 552 (56.4) | 0.247 |
| OMI | 308 (18.5) | 1,517 (19.5) | 0.332 | 180 (18.4) | 208 (21.2) | 0.115 |
| Previous PCI | 408 (24.5) | 1,707 (21.9) | 0.025 | 234 (23.9) | 269 (27.5) | 0.072 |
| Previous CABG | 77 (4.6) | 183 (2.4) | <0.001 | 40 (4.1) | 38 (3.9) | 0.814 |
| STEMI | 137 (8.2) | 922 (11.9) | <0.001 | 93 (9.5) | 113 (11.5) | 0.143 |
| Stable CAD | 685 (41.1) | 3,176 (40.9) | 0.854 | 419 (42.8) | 408 (41.7) | 0.601 |
| LVEF | 62.6±7.7 | 63.3±6.9 | 0.001 | 63.2±7.6 | 62.4±7.6 | 0.022 |
| eGFR before PCI (mL/min/1.73 m2) | 87.7±20.6 | 97.8±18.9 | <0.001 | 92.5±20.1 | 91.2±20.5 | 0.169 |
| SCr before PCI (µmol/L) | 78.7±18.8 | 74.6±14.6 | <0.001 | 76.5±16.8 | 78.4±17.7 | 0.016 |
| Triple vessel lesion | 768 (46.1) | 3,117 (40.1) | <0.001 | 414 (42.3) | 3,429 (43.8) | 0.506 |
| Syntax score | 12.0±8.5 | 11.1±7.6 | <0.001 | 11.3±8.0 | 11.4±8.3 | 0.745 |
| Contrast volume (mL) | 176.2±86.0 | 167.7±83.6 | <0.001 | 170.2±83.0 | 170.4±89.3 | 0.973 |
| IABP support | 21 (1.3) | 43 (0.6) | 0.001 | 8 (0.8) | 14 (1.4) | 0.199 |
| SCr after PCI (µmol/L) | 81.3±19.4 | 80.5±15.8 | 0.088 | 78.5±17.7 | 85.0±17.9 | <0.001 |
| CIN | 28 (1.7) | 131 (1.7) | 0.988 | 15 (1.5) | 39 (4.0) | 0.001 |
Data were shown as means±standard deviation or number (%).
CABG = coronary artery bypass grafting; CAD = coronary artery disease; CIN = contrast induced nephropathy; eGFR = estimated glomerular filtration rate; IABP = intra-aortic balloon pump; IOCM = iso-osmolality contrast media; LOCM = low-osmolar contrast media; LVEF = left ventricular ejection fraction; OMI = old myocardial infarction; PCI = percutaneous coronary intervention; PSM = propensity score matching; SCr = serum creatinine; STEMI = ST elevated myocardial infarction.