3 months after the injury (Barlow et al., 2010). Increasing societal awareness of the risk for traumatic brain injury during organized sports has made this a specific and pressing question, not only for researchers but also for parents, educators, and coaches. In addition to giving information about the prevalence and impacts of traumatic brain injury in youth, the ABCD study will be able to provide information on how such injuries affect substance use risk and, in turn, how substance use affects risk for traumatic brain injury.
