Evidence-based CT decision rule for pediatric head trauma
| Criteria | ciTBI Risk | Action |
|---|---|---|
| GCS<15 or skull fracture (<2yr) / GCS<15 or basilar fracture signs (≥2yr) | ~4.4% | CT Recommended |
| 0 factors | 0.02% | No CT (very low risk) |
| 1–2 intermediate factors | ~0.9% | Observe vs CT (shared decision) |
| ≥3 factors (for <2yr) | >2% | CT Recommended |
