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Table 3 The percentages of head CT abnormalities

From: TBI surveillance using the common data elements for traumatic brain injury: a population study

Abnormal CT finding N % of total abnormal CTs (n= 1,047) % of total CTs (n= 2,201) % of total population (n= 2,394)
Extracalvarial soft tissue swelling 368 35.1% 16.7% 15.3%
Fracture of skull 252 24.1% 11.4% 10.5%
Fracture of maxillofacial bones (except nose) 243 23.2% 11.0% 10.2%
Fracture of nasal bones 93 8.9% 4.2% 3.9%
Calvarial fracture through carotid canal 10 1% 0.5% 0.4%
Calvarial fracture through foramen magnum 8 0.8% 0.4% 0.3%
Subfalcine herniation 93 8.9% 4.2% 3.9%
Upward transtentorial herniation 8 0.8% 0.4% 0.3%
Downward transtentorial herniation 76 7.3% 3.5% 3.2%
Uncal herniation 27 2.6% 1.2% 1.1%
Tonsillar herniation 15 1.4% 0.7% 0.6%
Epidural hematoma 77 7.4% 3.5% 3.2%
Subdural hematoma 337 32.2% 15.3% 14.1%
Subarachnoid hemorrhage 319 30.5% 14.5% 13.3%
Intraventricular hemorrhage 65 6.2% 3.0% 2.7%
Parenchymal or hemorrhagic contusion 365 34.9% 16.6% 15.2%
Diffuse axonal injury (unilateral/bilateral) 50 4.8% 2.3% 2.1%
ANY bleed 701 67% 31.8% 29.8%
ANY fracture 425 40.6% 19.3% 17.8%
  1. All abnormalities were significantly more common with worse TBI severity (P < 0.0001, ANOVA).