Study design. BSI-18-GSI, 18-Item Brief Symptom Inventory Global Severity Index; CT, computed tomography; CVLT, California Verbal Learning Test; GCS, Glasgow Coma Scale; GOSE, Glasgow Outcome Scale-Extended; RPQ, Rivermead Post-Concussion Symptoms Questionnaire; SWLS, Satisfaction with Life Scale; TBI, traumatic brain injury; TMT-A/B, Trail Making Test Parts A and B; WAIS-PSI, Processing Speed Index from the Wechsler Adult Intelligence Scale, 4th Edition.