Half of all TBIs are due to transportation accidents involving automobiles, motorcycles, bicycles, and pedestrians.
These accidents are the major cause of TBI in people under age 75. For those 75 and older, falls cause the majority of TBIs.
Approximately 20 percent of TBIs are due to violence, such as firearm assaults and child abuse, and about 3 percent are due to sports injuries.
Fully half of TBI incidents involve alcohol use.
The cause of the TBI plays a role in determining the patient’s outcome.
For example, approximately 91 percent of firearm TBIs (two-thirds of which may be suicidal in intent) result in death, while only 11 percent of TBIs from falls result in death.