CHALICE risk score for head injury in children

Witnessed loss of consciousness of > 5 min duration

History of amnesia (either antegrade or retrograde) of > 5 min duration

Abnormal drowsiness (defined as drowsiness in excess of that expected by the examining doctor)

≥ 3 vomits after head injury (a vomit is defined as a single discrete episode of vomiting)

Suspicion of non‐accidental injury (NAI, defined as any suspicion of NAI by the examining doctor)

Seizure after head injury in a patient who has no history of epilepsy

Glasgow Coma Score < 14, or < 15 if < 1 year old

Suspicion of penetrating or depressed skull injury, or tense fontanelle

Signs of a basal skull fracture (defined as evidence of blood or CSF from ear or nose, panda eyes, Battle's sign, hemotympanum, facial crepitus, or serious facial injury)

Positive focal neurologic sign (defined as any focal neurologic sign, including motor, sensory, coordination, or reflex abnormality)

Presence of bruise, swelling or laceration > 5 cm if < 1 year old

High‐speed road traffic accident either as pedestrian, cyclist or occupant (defined as accident with speed > 64 km/h [40 mph])

Fall of > 3 m in height

High‐speed injury from a projectile or an object