Research examined the estimated prevalence of chronic traumatic brain disease among former NFL players who died from 2008-2023. The estimated rate of CTE was substantially higher than those observed in brain samples from the general population. 93.5% of the nearly 400 players who whose brains were donated to examination showed evidence.
Less than 1% of sample brain samples contain evidence of CTE. But the presence of changes in the brain does not mean a person will develop a dementia or experience declining cognitive abilities. Potential symptoms include depression, memory problems and severe mood changes.
The findings follow a study released in august. At least one in four former NFL players died between 2016 and 2021.
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