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CTE Linked to Higher Dementia Risk, Study Reveals

2/20/2026

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Story summary
  • Boston University researchers report that advanced chronic traumatic encephalopathy significantly increases dementia risk, with stage IV individuals four times and stage III twice as likely to develop dementia.
  • The study analyzed 614 brain donations from people with a history of repeated head trauma.
  • Among those diagnosed with dementia, 40% were misclassified as having Alzheimer's disease.
  • Researchers call for recognizing CTE as an Alzheimer's-related dementia to improve diagnosis and treatment.