Table I.
Baseline characteristics.
| Variable | RIGOR study (N.=291) |
2007 STS database (N.=154,188) |
|---|---|---|
| Age (median, IQR) | 63.0 (56.0–70.5) | 65.0 (57.0–73.0) |
| Male (%) | 78.7 | 73.0 |
| Caucasian race (%) | 86.9 | 85.1 |
| Body mass index (%) | ||
| <18.5 kg/m2 | 1.0 | 0.8 |
| >30.0 kg/m2 | 39.9 | 40.5 |
| Current smoker (%) | 24.0 | 24.7 |
| Former smoker (%) | 69.1 | NA |
| Diabetes mellitus (%) | 35.4 | 39.0 |
| Dyslipidemia (%) | 84.5 | 80.6 |
| Hypertension (%) | 85.2 | 82.7 |
| Congestive heart failure (%) | 12.4 | 13.2 |
| Peripheral arterial disease (%) | 11.7 | 15.1 |
| Cerebrovascular disease (%) | 8.6 | 13.8 |
| Myocardial infarction within 7 days (%) | 21.7 | 24.5 |
| Previous percutaneous coronary intervention (%) | 20.6 | 23.5 |
| Preoperative creatinine (median mg/dL, IQR) | 1.0(0.8–1.1) | 1.0(0.9–1.2) |
| Extent of coronary artery disease (%) | ||
| 3 vessel disease (>50% stenoses) | 83.2 | 76.0 |
| Left main (>50% stenosis) | 39.2 | 30.6 |
| Surgery status (%) | ||
| Elective | 38.2 | 46.4 |
| Urgent | 60.8 | 48.7 |
| Emergent | 1.0 | 4.6 |
| First-time CABG (%) | 100.0 | 96.1 |
| Isolated CABG (%) | 91.7 | 100.0 |
| Cardiopulomary bypass (%) | 97.6 | 79.6 |
| Patients with internal mammary artery graft (%) | 96.9 | 93.8 |
| Number of total grafts per patient (%) | ||
| 1 | 1.0 | 4.6 |
| 2 | 18.9 | 15.7 |
| 3 | 45.0 | 36.1 |
| 4 | 25.1 | 30.2 |
| ≥5 | 10.0 | 13.2 |
| Discharge medications (%) | ||
| Aspirin | 100 | 93.8 |
| Other antiplatelet agent | 10.3 | 28.8 |
| Oral anticoagulation | 10.0 | 9.1 |
| ACE inhibitor | 50.9 | 42.8 |
| Beta-blocker | 98.6 | 90.1 |
| Lipid lowering agent | 96.2 | 88.3 |
IQR: interquanile range; CABG: coronary artery bypass graft surgery; ACE: angiorensin converting enzyme.