| Primary outcome | Secondary outcomes |
---|---|---|
CATCH | Need for neurological intervention, defined as death within 7Â days secondary to the head injury or need for any of the following within 7Â days: craniotomy, elevation of skull fracture, monitoring of intracranial pressure, insertion of endotracheal tube for the management of head injury | Brain injury on CT, defined as any acute intracranial finding revealed on CT attributable to acute injury, including closed depressed skull fracture (depressed past the inner table) and pneumocephalus but excluding non-depressed skull fractures and basilar skull fractures |
CHALICE | Clinically significant intracranial injury (CSII), defined as death as a result of head injury, requirement for neurosurgical intervention, marked abnormality on CT (any new, acute, traumatic intracranial pathology as reported by consultant radiologist, including intracranial haematomas of any size, cerebral contusion, diffuse cerebral oedema and depressed skull fractures) | Presence of skull fracture Admission to hospital |
PECARN | Clinically important traumatic brain injury (ciTBI), defined as death from TBI, neurosurgical intervention for TBI (intracranial pressure monitoring, elevation of depressed skull fracture, ventriculostomy, haematoma evacuation, lobectomy, tissue debridement, dura repair, other), intubation of more than 24Â h for TBI or hospital admission of 2 nights or more for TBI* in association with TBI on CT** | None |