Initial injury classification by intervention
| No intervention | Surgical intervention | P value | |
| AIS brain | 3.4±0.6 | 4.8±0.3 | <0.001 |
| Patients, n | 75 | 6 | |
| SDH size (cm) | 0.49±0.3 | 1.1±0.6 | 0.05 |
| Patients with SDH, n | 29 | 5 | |
| Midline shift (cm) | 0.49±0.5 | 0.56±0.4 | 0.38 |
| Patients with midline shift, n | 6 | 5 |
AIS, Abbreviated Injury Scale; SDH, subdural hematoma.