Table 1.
Patient Demographics, Risk Factors and Operative Data
| Variable | Study Site n mean ± SD | 2001–2003 % median (25%–75%) | STS (2001–03) % median (25%–75%) | P-Value |
| No. of Patients | 504 | 448841 | ||
| Demographics/Risk Factors | ||||
| Age (yrs) | 64 ± 11 | 65 (56–72) | 66 (57–74) | |
| Male | 368 | 73.0 | 71.3 | .433 |
| Caucasian | 474 | 94.0 | 87.1 | <.001 |
| Black | 5 | 1 | 5.17 | <.001 |
| Hispanic/Other | 25 | 4.96 | 6.84 | |
| BSA (m2) | 2.08 ± 0.25 | 2.08 (1.89–2.26) | 1.95 (1.82 – 2.13) | <.001 |
| Obese (BMI>35 kg/m2) | 103 | 20.4 | 13.4 | <.001 |
| Current Smoker | 101 | 20 | 22.1 | .295 |
| Family History of CAD | 403 | 80 | 43.2 | <.001 |
| Diabetes | 168 | 33.30 | 35.0 | .469 |
| Insulin-dependent | 41 | 8.13 | 10.47 | .102 |
| Hypercholesterolemia | 323 | 64 | 68.49 | .038 |
| Renal Failure | 10 | 1.98 | 5.20 | .002 |
| Hypertension | 358 | 71 | 74.78 | .060 |
| Peripheral Vascular Disease | 35 | 6.94 | 15.80 | <.001 |
| Cerebrovascular Disease | 60 | 11.90 | 13.21 | .425 |
| COPD | 68 | 13.50 | 18.61 | .004 |
| Myocardial Infarction | 266 | 52.80 | 45.53 | <.001 |
| Congestive Heart Failure | 44 | 8.73 | 13.80 | <.001 |
| Unstable | 222 | 44.10 | 47.05 | .193 |
| Arrhythmia (any) | 42 | 8.30 | 9.43 | .443 |
| Triple Vessel Disease | 422 | 83.70 | 74.63 | <.001 |
| Left Main Disease >50% | 118 | 23.40 | 24.54 | .594 |
| Ejection Fraction (%) | 48 ± 11 | 50 (40–55) | 50 (40–60) | |
| Previous CV intervention | 116 | 23.00 | 20.36 | .155 |
| Operative Data | ||||
| Elective | 129 | 25.60 | 51.88 | <.001 |
| Emergent | 63 | 12.50 | 4.10 | <.001 |
| Redo Surgery | 15 | 2.98 | 8.93 | <.001 |
| No. of Grafts | 3.58 ± 1.01 | |||
| Arterial | 1.63 ± 0.98 | |||
| Vein | 1.94 ± 0.98 | |||
| ITA Used | 473 | 93.80 | 89.84 | .004 |
| Left ITA used | 471 | 93.50 | 89.34 | .004 |
| Aortic Cross-Clamp (min) | 58 ± 22 | 55 (45–68) | 63 (47 – 83) | .004 |
| Perfusion time (min) | 90 ± 31 | 85 (70–106) | 94 (73 – 119) | |
| Off-pump | 21 | 4.17 | 20.48 | <.001 |
| STS Predicted Mortality (%) | 2.94 ± 5.0 | 3.13 |
Ejection fraction was available in 464 patients. CV intervention = any cardiovascular intervention (surgery, angioplasty, or stenting). The urgent cases (197/504) are not compared in the STS database.