Table 1. Baseline mean and standard deviation of the age and hemoglobin levels.
| Risk factor | Mean | ± SD |
| Age | 63.12 | ± 9.847 |
| Hemoglobin level, mg/dL (males) | 13.45 | ± 1.803 |
| Hemoglobin level, mg/dL (females) | 12.17 | ± 1.511 |
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