Calculate the prevalence of positive CTC findings and to subdivide them to explore potential correlations with biochemical, clinical, and patient baseline variables.

The CT scan was acknowledged as positive if the final radiologic interpretation of all imaging studies reported one or more listed radiological findings:

• Epidural hematoma
• Subdural hematoma
• Subarachnoid hematoma
• Intraparenchymal hematoma (IPH)
• Intraventricular hematoma
• Fossa posterior hematoma
• Acute infarct or dense artery sign
• Mass effect or sulcal effacement
• Signs of herniation
• Basal cistern compression or midline shift
• Cerebral contusion
• Depressed skull fracture
• Diastatic skull fracture
• Pneumocephalus
• Cerebral edema
• Diffuse axonal injury
• Tumor
• Intracranial infection
• Other which resulted in hospitalization

We wanted to analyze our use of SNC CPG and evaluate if a more stringent application could reduce the potentially unnecessary overuse of CTC

We aim to evaluate the 30-day mortality and readmission rates to a hospital following CTC performed in the ED.

The need for neurological intervention was defined as within 7 days requiring 1) neurosurgical intervention (e.g., craniotomy, hematoma evacuation, elevation of skull fracture, intracranial pressure monitoring, or intubation for head injuries indicated on CT) or 2) neuroradiological intervention (e.g., thrombectomy or intravascular embolization).