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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: J Head Trauma Rehabil. 2018 Jan-Feb;33(1):E18–E27. doi: 10.1097/HTR.0000000000000325

Table 1.

Criteria for TBI Severity Classification

Severity GCS LOC PTA Structural Brain Changes*
Mild TBI 13–15 ≤ 30 min. ≤ 24 hrs. No
Complicated Mild TBI 13–15 ≤ 30 min. ≤ 24 hrs. Yes
Moderate/Severe TBI ≤ 12 > 30 min. > 24 hrs. Yes

Abbreviation: GCS, Glasgow Coma Scale; LOC, Loss of consciousness; PTA, Post traumatic amnesia; TBI, Traumatic brain injury.

Note. Initial GCS scores were not available for intubated patients with msevTBI.

*

Cranial magnetic resonance imaging or computed tomography scans were used to determine evidence of structural brain changes, such as contusions, subdural hematoma, or diffuse axonal injury.