Invariant_mTBI_Symptom_Structure_-_Supplement_Material_REV1_NOV5 – Supplemental material for Invariance of the Bifactor Structure of Mild Traumatic Brain Injury (mTBI) Symptoms on the Rivermead Postconcussion Symptoms Questionnaire Across Time, Demographic Characteristics, and Clinical Groups: A TRACK-TBI Study AgtarapStephanie KramerMark D. Campbell-SillsLaura YuhEsther MukherjeePratik ManleyGeoffrey T. McCreaMichael A. DikmenSureyya GiacinoJoseph T. SteinMurray B. NelsonLindsay D. 2020 <p>Supplemental material, Invariant_mTBI_Symptom_Structure_-_Supplement_Material_REV1_NOV5 for Invariance of the Bifactor Structure of Mild Traumatic Brain Injury (mTBI) Symptoms on the Rivermead Postconcussion Symptoms Questionnaire Across Time, Demographic Characteristics, and Clinical Groups: A TRACK-TBI Study by Stephanie Agtarap, Mark D. Kramer, Laura Campbell-Sills, Esther Yuh, Pratik Mukherjee, Geoffrey T. Manley, Michael A. McCrea, Sureyya Dikmen, Joseph T. Giacino, Murray B. Stein and Lindsay D. Nelson in Assessment</p>