MIRROR LIGHTS: Traumatic brain injuries can increase stroke risk: Study MIRROR LIGHTS: Traumatic brain injuries can increase stroke risk: Study Bangalore Mirror Bureau / Updated: Apr 23, 2021, 06:00 IST 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. TBI cases are rising due to a range of factors.