• Julia E Culhane, Colleen E Jackson, Yorghos Tripodis, Christopher J Nowinski, Kristen Dams-O'Connor, Erika Pettway, Madeline Uretsky, Bobak Abdolmohammadi, Evan Nair, Brett Martin, Joseph Palmisano, Douglas I Katz, Brigid Dwyer, Daniel H Daneshvar, Lee E Goldstein, Neil W Kowall, Robert C Cantu, Robert A Stern, Bertrand Russell Huber, John F Crary, Jesse Mez, Thor D Stein, Ann C McKee, and Michael L Alosco.
• Boston University Alzheimer's Disease Research Center, BU CTE Center, Department of Neurology, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, USA.
• J. Neurotrauma. 2024 Apr 15.

AbstractRepetitive head impacts (RHIs) from football are associated with the neurodegenerative tauopathy chronic traumatic encephalopathy (CTE). It is unclear whether a history of traumatic brain injury (TBI) is sufficient to precipitate CTE neuropathology. We examined the association between TBI and CTE neuropathology in 580 deceased individuals exposed to RHIs from football. TBI history was assessed using a modified version of the Ohio State University TBI Identification Method Short Form administered to informants. There were 22 donors who had no TBI, 213 who had at least one TBI without loss of consciousness (LOC), 345 who had TBI with LOC, and, of those with a history of TBI with LOC, 36 who had at least one moderate-to-severe TBI (msTBI, LOC >30 min). CTE neuropathology was diagnosed in 405. There was no association between CTE neuropathology status or severity and TBI with LOC (odds ratio [OR] = 0.95, 95% confidence interval [CI] = 0.64-1.41; OR = 1.22, 95% CI = 0.71-2.09) or msTBI (OR = 0.70, 95% CI = 0.33-1.50; OR = 1.01, 95% CI = 0.30-3.41). There were no associations with other neurodegenerative or cerebrovascular pathologies examined. TBI with LOC and msTBI were not associated with CTE neuropathology in this sample of brain donors exposed to RHIs from American football.

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