Final answer:
Approximately 30 percent of injury-related deaths in the United States are caused by head injuries, including traumatic brain injuries (TBIs). These injuries result in immediate death and disability.
Step-by-step explanation:
According to the Centers for Disease Control and Prevention (2010), approximately 30 percent of all injury-related deaths in the United States are caused by head injuries. This includes traumatic brain injuries (TBIs), which are a major cause of immediate death and disability. The majority of head injuries involve falls, but automobile and motorcycle accidents are also prominent causes.