| Female donor (0) | Male donor (+0.1) |
| Donor/recipient Rh-D negative (–0.06) | Donor/recipient Rh-D positive (0) |
| Apheresis collection (0) | Whole blood collection (+0.16) |
| Irradiated unit (–0.08) | Unirradiated unit (0) |
| AS-3 (–0.06) | AS-1 (0) |
| 60-year-old male recipient (0) | 85-year-old female recipient (+0.4) |
| BMI – 30 (–0.5) | BMI – 18 (-0.3) |
| Cumulative Hb increment: 0.59 g/dL | Cumulative Hb increment: 1.65 g/dL |
| Female donor (0) | Male donor (+0.1) |
| Donor/recipient Rh-D negative (–0.06) | Donor/recipient Rh-D positive (0) |
| Apheresis collection (0) | Whole blood collection (+0.16) |
| Irradiated unit (–0.08) | Unirradiated unit (0) |
| AS-3 (–0.06) | AS-1 (0) |
| 60-year-old male recipient (0) | 85-year-old female recipient (+0.4) |
| BMI – 30 (–0.5) | BMI – 18 (-0.3) |
| Cumulative Hb increment: 0.59 g/dL | Cumulative Hb increment: 1.65 g/dL |
Simplified Model for Mean HEMOGLOBIN INCREMENTij = 2.41 + 0.1(MALE DONORij) − .06(DONOR/RECIPIENT RH NEGATIVEj) + 0.16(WHOLE BLOODij) + −0.06(SOLUTION AS 3ij) + −.08(UNIT GAMMA IRRADIATEDij) + −0.28(MALE RECIPIENTj) + 0.005(RECIPIENT AGEij)+ −.017(RECIPIENT BMIij) + −0.16(PRE-TRANSFUSION HB LEVELij)