TABLE 1.
Preoperative Characteristics.
| Preoperative Variables n |
FY2009–2013 2008 |
FY2013 506 |
P |
|---|---|---|---|
| Age (years) | 66.9 | 67.8 | 0.175 |
| BMI (kg/m2) | 29.7 | 30.5 | 0.350 |
| Creatinine (mg/mL) | 1.3 | 1.2 | 0.009 |
| Ejection Fraction (%) | 51.4 | 53.5 | 0.041 |
| Female (%) | 31.7% | 30.4% | 0.574 |
| Smoker (%) | 20.1% | 16.0% | 0.035 |
| Diabetes (%) | 38.7% | 41.3% | 0.281 |
| Hypertension (%) | 82.9% | 85.4% | 0.180 |
| Peripheral Arterial Disease (%) | 16.4% | 16.2% | 0.920 |
| Dialysis-Dependent (%) | 3.5% | 1.8% | 0.045 |
| Chronic Lung Disease (%) | 21.5% | 24.3% | 0.177 |
| Prior PCI (%) | 21.6% | 20.4% | 0.531 |
| Prior Sternotomy (%) | 32.6% | 31.4% | 0.608 |
| Congestive Heart Failure (%) | 35.0% | 41.5% | 0.006 |
| NYHA II | 5.5% | 11.5% | 0.000 |
| NYHA III | 18.5% | 19.0% | 0.802 |
| NYHA IV | 10.9% | 11.1% | 0.928 |
| Status | |||
| Elective (%) | 58.3% | 55.9% | 0.339 |
| Urgent (%) | 41.7% | 44.1% | 0.339 |
| STS PROMM (%) | 19.9% | 19.8% | 0.915 |
| STS PROM (%) | 3.4% | 3.1% | 0.414 |
Comparison of preoperative characteristics between the development and validation cohorts.