Table 1: Descriptive statistics for matched sample.
| Patient and Procedure Characteristics | Low Group (n = 85) | High Group (n = 85) | p-value |
| Age, mean (SD) | 62.38 (14.05) | 64.18 (14.03) | 0.41 |
| Sex, male (%) | 75.3% | 76.5% | 1.00 |
| Anemia | 0.93 | ||
| none (%) | 76.5% | 77.6% | |
| mild (%) | 14.1% | 11.8% | |
| severe (%) | 9.4% | 10.6% | |
| Procedure Type | 0.57 | ||
| 1. iAVR + iCABG | 24.7% | 25.9% | |
| 2. AVR + another valve +/- CABG | 4.7% | 3.5% | |
| 3. valve-AVR +/- CABG | 3.5% | 3.5% | |
| 4. AVR + any Aortic | 31.8% | 23.5% | |
| 5. valve-AVR + Aortic | 3.5% | 11.8% | |
| 6. Aortic only | 17.6% | 20.0% | |
| 7. CABG + Valve + Aortic | 9.4% | 9.4% | |
| 8. all other cases | 4.7% | 2.4% |
P-values for age calculated using an independent t-test. P-values for sex, anemia, and procedure type calculated using Fisher's Exact Test.