Table 1 Diagnostic criteria for mild traumatic injury to the head.^a

Injury to the head fulfilling both of the following:

1. Associated with none of the following:

 Loss of consciousness for > 30 min

 Glasgow Coma Scale (GCS) score < 13

 Post-traumatic amnesia lasting > 24 h1

 Altered level of awareness for > 24 h

 Imaging evidence of a traumatic head injury such as skull fracture, intracranial haemorrhage and/or brain contusion

2. Associated with one or more of the following symptoms and/or signs

 transient confusion, disorientation or impaired consciousness

 loss of memory for events immediately before or after the head injury

 two or more of the following symptoms suggestive of mild traumatic brain injury:

  nausea

  vomiting

  visual disturbances

  dizziness and/or vertigo

  gait and/or postural imbalance

  impaired memory and/or concentration