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Potential pre-hospital variables identified as defining major trauma.
| Variables | (n) |
| Fatal outcome | 21 |
| Injury type/pattern | 16 |
| Intensive Care Unit (ICU) admission | 12 |
| Requires surgical intervention | 12 |
| Mechanism of injury (MOI) | 9 |
| Haematocrit decrease | 7 |
| Requiring ventilation | 5 |
| Pre-hospital index | 4 |
| Receiving blood products | 4 |
| Deranged physiology | 2 |
| Revised Trauma Score (RTS) | 2 |
| Paediatric Trauma Score (PTS) | 1 |
