Table 1. Patients baseline characteristic.
| Variables | No post-operative MI (n=4501) | Postoperative MI (n=141) | P |
|---|---|---|---|
| Age (years) | 66.00±9.01 | 67.01±9.34 | 0.068* |
| Sex (female) | 22% (n=990) | 29.8% (n=42) | 0.028# |
| CCS class | 0.015# | ||
| 1 | 14.5% (n=652) | 20.6% (n=29) | |
| 2 | 35.9% (n=1,616) | 26.2% (n=37) | |
| 3 | 36.2% (n=1,629) | 34.0% (n=48) | |
| 4 | 13.4% (n=604) | 19.1% (n=27) | |
| NYHA class | 0.129# | ||
| 1 | 38.1% (n=1,714) | 34.0% (n=48) | |
| 2 | 48.0% (n=2,160) | 46.1% (n=65) | |
| 3 | 11.3% (n=510) | 17.7% (n=25) | |
| 4 | 2.6% (n=117) | 2.1% (n=3) | |
| Myocardial infarction in the past | 54.8% (n=2,466) | 58.2% (n=82) | 0.429# |
| Current smoking | 15.5% (n=699) | 14.2% (n=20) | 0.664# |
| Diabetes | 34.1% (n=1,537) | 35.5% (n=50) | 0.746# |
| Hypertension | 91.9% (n=4,137) | 94.3% (n=133) | 0.299# |
| Hyperlipidemia | 35.5% (n=1,597) | 39.7% (n=56) | 0.301# |
| Heart rate | 0.334# | ||
| Sinus rhythm | 94.4% (n=4,247) | 95.7% (n=135) | |
| Atrial fibrillation | 4.9% (n=222) | 2.8% (n=4) | |
| Different | 0.7% (n=32) | 1.4% (n=2) | |
| Renal function | 0.672# | ||
| Normal | 63.3% (n=2,592) | 62.1% (n=82) | |
| Moderate | 63.3% (n=1,243) | 33.3% (n=44) | |
| Severe | 5.7% (n=234) | 4.5% (n=6) | |
| Dialysis | 0.6% (n=26) | 0 | |
| Chronic lung disease | 3.8% (n=171) | 4.3% (n=6) | 0.781# |
| Acute coronary syndrome | 22.8% (n=1,026) | 31.9% (n=45) | 0.011# |
| Left main coronary artery stenosis | 53.1% (n=2,388) | 56.0% (n=79) | 0.488# |
| CABG urgency | 0.003# | ||
| NON-elective | 18.4% (n=828) | 28.4% (n=40) | |
| Elective | 81.6% (n=3,673) | 71.6% (n=101) | |
| Incomplete revascularization | 29.4% (n=1,323) | 46.8% (n=66) | 0.001# |
| EuroSCORE II | 2.18±1.02 | 2.78±1.21 | 0.005* |
*, Mann-Whitney U test; #, Chi2 test. Renal function is defined by calculated creatinine clearance as estimated using the Cockcroft-Gault formula as follows: normal (>85 mL/min); moderately impaired (50–85 mL/min); severely impaired (<50 mL/min); on dialysis (virtually absent). MI, myocardial infraction; CCS, Canadian Cardiovascular Society; CABG, coronary artery bypass graft; NYHA, New York Heart Association.