Table 1.
Baseline characteristics before and after propensity score matching
| Pre-Matching | Post-Matching | |||||
|---|---|---|---|---|---|---|
| Variables | EES (n=5,058) | CABG (n=6,247) | ASD | EES (n=2,960) | CABG (n=2,960) | ASD |
| Age (%) | ||||||
| <59 | 17.16 | 18.20 | 2.70 | 18.00 | 17.80 | 0.60 |
| 60-69 | 26.59 | 28.37 | 4.00 | 26.40 | 26.80 | 1.00 |
| 70-79 | 35.77 | 37.14 | 2.90 | 36.70 | 36.30 | 0.80 |
| >=80 | 20.48 | 16.30 | 10.80 | 18.90 | 19.10 | 0.50 |
| Mean Age (yr) | 70.21±10.60 | 69.13±10.32 | 10.30 | 69.94±10.67 | 69.62±10.53 | 3.00 |
| Body Surface Area | 2.00±0.27 | 2.02±0.27 | 5.80 | 2.00±0.27 | 2.00±0.27 | 0.10 |
| Sex (%) | ||||||
| Male | 60.50 | 64.80 | 8.90 | 62.00 | 61.50 | 1.00 |
| Female | 39.50 | 35.20 | 8.90 | 38.00 | 38.50 | 1.00 |
| Hispanic ethnic background (%) | 13.15 | 8.90 | 13.60 | 12.00 | 11.20 | 2.50 |
| Race (%) | ||||||
| White | 78.39 | 85.51 | 18.60 | 81.30 | 81.50 | 0.40 |
| Black | 11.05 | 7.88 | 10.90 | 9.80 | 10.10 | 1.20 |
| Other | 10.56 | 6.61 | 14.10 | 8.90 | 8.40 | 1.90 |
| Smoking (%) | 26.69 | 26.12 | 1.30 | 26.40 | 26.80 | 1.10 |
| Diabetes Mellitus (%) | 47.57 | 48.97 | 2.80 | 48.90 | 48.30 | 1.20 |
| Hypertension (%) | 75.58 | 77.70 | 5.00 | 77.00 | 78.20 | 2.80 |
| Hyperlipidemia (%) | 63.54 | 60.30 | 6.70 | 62.40 | 63.30 | 1.90 |
| Prior PCI (%) | 35.03 | 17.72 | 40.10 | 26.30 | 25.60 | 1.70 |
| Unstable Angina (%) | 20.32 | 19.72 | 1.50 | 20.30 | 20.50 | 0.60 |
| Ejection Fraction (%) | ||||||
| <20% | 0.81 | 2.19 | 11.40 | 1.20 | 1.20 | 0.30 |
| 20-29% | 4.74 | 8.58 | 15.40 | 6.60 | 6.60 | 0.10 |
| 30-39% | 6.68 | 13.57 | 23.00 | 9.40 | 9.30 | 0.20 |
| 40-49% | 12.77 | 19.63 | 18.70 | 16.80 | 16.10 | 1.70 |
| >=50% | 68.70 | 55.50 | 27.50 | 65.30 | 65.70 | 0.90 |
| missing | 6.29 | 0.53 | 32.10 | 0.80 | 1.10 | 2.50 |
| Previous myocardial infarction (%) | ||||||
| Within 1-7 days | 16.01 | 19.51 | 9.20 | 17.20 | 17.40 | 0.40 |
| Within 8-14 days | 2.17 | 7.89 | 26.40 | 3.10 | 3.20 | 0.80 |
| Within 15-20 days | 0.55 | 1.38 | 8.40 | 0.90 | 0.80 | 0.70 |
| >20 days | 19.24 | 23.16 | 9.60 | 21.60 | 21.20 | 0.80 |
| No previous MI | 62.02 | 48.06 | 28.40 | 57.30 | 57.40 | 0.20 |
| Cerebrovascular disease (%) | 3.70 | 9.48 | 23.50 | 5.30 | 5.60 | 1.30 |
| COPD (%) | 7.26 | 13.53 | 20.70 | 9.20 | 9.60 | 1.20 |
| Peripheral arterial disease (%) | 13.66 | 17.00 | 9.30 | 14.80 | 15.60 | 2.40 |
| Congestive heart failure (%) | ||||||
| None | 87.52 | 74.68 | 33.30 | 83.20 | 83.40 | 0.60 |
| At current admission | 7.85 | 20.55 | 37.00 | 11.60 | 11.70 | 0.30 |
| Before current admission | 4.63 | 4.77 | 0.70 | 5.30 | 4.90 | 1.50 |
| Malignant ventricular arrhythmia (%) | 0.51 | 1.23 | 7.70 | 0.70 | 0.60 | 0.80 |
| Prior PCI (%) | 87.52 | 74.68 | 33.30 | 27.35 | 27.27 | 0.20 |
| eGFR Categories | ||||||
| 30≤eGFR<60 | 84.12 | 81.21 | 7.70 | 83.38 | 82.91 | 1.30 |
| 15≤eGFR<30 | 6.88 | 9.65 | 10.10 | 7.53 | 7.84 | 1.10 |
| eGFR<15 | 0.73 | 1.01 | 3.00 | 0.78 | 0.88 | 1.10 |
| dialysis | 8.26 | 8.13 | 0.50 | 8.31 | 8.38 | 0.20 |
| No. of diseased vessels (%) | ||||||
| 2, with proximal LAD artery | 18.25 | 17.03 | 3.20 | 23.90 | 23.80 | 0.30 |
| 2, without proximal LAD artery | 52.77 | 15.26 | 86.20 | 30.10 | 30.10 | 0.10 |
| 3, with proximal LAD artery | 10.16 | 35.92 | 64.30 | 16.80 | 17.40 | 1.40 |
| 3, without proximal LAD artery | 18.82 | 31.79 | 30.20 | 29.10 | 28.80 | 0.70 |
Plus-minus values are means±SD. CABG = coronary artery bypass graft surgery; COPD = chronic obstructive pulmonary disease; EES = everolimus eluting stent; eGFR= estimated glomerular filtration rate; LAD = left anterior descending artery. ASD reported are percentages. ASD less than 10% denotes relatively small imbalance.