heightens the risk of depression and PTSD VA National Center for Traumatic Brain Injury brain injury increases your chances of also having PTSD traumatic brain injury traumatic head injuries co-occurring TBI AND PTSD - PTSD: National Center for PTSD 22 per cent of all military injuries TBI AND PTSD - PTSD: National Center for PTSD 22 percent of all combat casualties in Iraq and Afghanistan prevalence of TBI patients "Traumatic Brain Injury and PTSD" 22 percent of combat casualties VA estimates co-occurring 22 percent of combat casualties 22 percent of all combat casualties