Traumatic brain injury is a global health problem affecting over 60 million people a year worldwide. Share Via Email | A+A A- By ANI WASHINGTON: Stroke risk for patients with traumatic brain injuries is at its highest in the four months following injury and remains significant for up to five years post-injury, a new study suggested. The findings of the study were published in the International Journal of Stroke. The research was led by a team at the University of Birmingham. Traumatic brain injury (TBI) is a global health problem affecting over 60 million people a year worldwide. Incidences of TBI are rising due to a range of factors including increased falls in the elderly, military conflict, sports injuries, and road traffic accidents. However, advances in critical care and imaging have led to a reduction in TBI-related mortality.