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The basic information of participants
| Regular donors (>30 times) | First-time donors | |
|---|---|---|
| 90.8 (79-130) | 86.3 (55-108) | Weight (kg) |
| 49.5 (41-56) | 33.8 (20-57) | Age (years) |
| 462 (453-471) | 465 (450-476) | Blood volume (mL) |
| 15.35 (14.5-16) | 14.23 (12-17) | Hemoglobin (g/dL) |
