
Severe CTE Linked to Dementia Risk, NIH Study Finds
An NIH-funded study of 614 donated brains with known repetitive head impacts shows severe CTE (stages III/IV) is strongly linked to dementia risk (stage IV ~4.5x higher); milder CTE (stages I-II) shows no association with dementia, mood changes, or functional decline, helping clarify CTE's role in neurodegeneration.












