Table 1

Definitions of injury severity

Severity of traumatic brain injuryDefinition
MildAn injury causing unconsciousness for less than 15 minutes and a GCS after initial resuscitation of 13–15
ModerateAn injury causing unconsciousness for more than 15 minutes and a GCS after initial resuscitation of 9–12
SevereAn injury causing unconsciousness for more than 6 hours and a GCS after initial resuscitation of 3–8