Distribution of the number of transfusions by birth weight
| Unit A | Unit B | |||
|---|---|---|---|---|
| <1000 g | ⩾1000 g | <1000 g | ⩾1000 g | |
| Values are mean (SD) unless otherwise indicated. | ||||
| Total number of infants | 9 | 37 | 16 | 20 |
| Birth weight (g) | 850 (12) | 1840 (75) | 803 (127) | 1870 (91) |
| Total number of transfusions | 94 (55%) | 74 (45%) | 106 (71%) | 45 (29%) |
| Number of transfusions per infant | 8.95 (6.0) | 2 (1.25) | 6.62 (4.5) | 2.25 (1.97) |
| Mean difference (CI) | 6.9 (4.3 to 9.5) | 4.3 (2.0 to 6.6) | ||
| p Value (t test) | 0.001 | 0.004 | ||