Clinical Research Directory

Inclusion Criteria: * LONGITUDINAL Telephone Assessment: * Participated in TRACK-TBI, * At least two years post injury, and * Completed at least 1 GOSE during the TRACK-TBI follow-up assessments * LONGITUDINAL BIOMARKER In-Person Assessment: Must complete at least one Longitudinal Telephone Assessment and fall into one of the following groups: * Group 1- Completed TRACK-TBI 6M MRI and are stable or improved with regard to Criteria for Establishing Decline * Group 2- Criteria for Establishing Decline met when comparing the Telephone Assessments to the last completed TRACK-TBI assessment * Group 3- All TRACK-TBI orthopedic controls Ability of participant or legally authorized representative to provide informed consent Exclusion Criteria: * Dementia diagnosed prior to the index TBI