Clinical features Seizure Focal neurological deficit Intracranial lesion Loss of consciousness Altered consciousness (including disordered consciousness,  confused, disoriented, or dazed) Post traumatic amnesia (including amnesia of blow) Depressed, basilar or linear skull fracture Study methodology to support the recommendations Systematic review [Rees, 2003] [15]   ≥1 are required for TBI diagnosis   Systematic review [Carroll et al, 2004] [3] ≥1 are required for TBI diagnosis   Analysis of dataset [Malec et al, 2007] [16]*   Either ≥1 of these, or…   ...≥1 are required for TBI diagnosis Consensus [Menon et al, 2010] [5]   ≥1 are required for TBI diagnosis *The minimumcriteria for Mayo Classification for mild (probable) TBI were applied, rather than symptomatic (possible) TBI, since the latter category allows a degree of uncertainty of a TBI diagnosis.

Table 4: Summary of lowest thresholds for diagnosingtraumatic brain injury (TBI) in the literature.