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Mean units of blood transfused in each AISchest group
| Chest Abbreviated Injury Severity (AIS) | Mean units of blood transfused (SD) | No. receiving transfusion |
|---|---|---|
| 1 | 3.83 ± 2.99 | 6 |
| 2 | 2.08 ± 1.78 | 12 |
| 3 | 3.52 ± 2.47 | 50 |
| 4 | 4.66 ± 3.56 | 56 |
| 5 | 6.05 ± 6.27 | 35 |
| 6 | 4.33 ± 1.52 | 3 |
