CTE estimated in about three-quarters of former NFL players who died from 2008 to 2023
Scientific American reports a 2,362-player study adjusted for higher brain-donation likelihood among players with cognitive symptoms.
TLDR
ABC News reports an adjusted CTE estimate of 74.5% among 2,362 deceased former NFL players. Scientific American reports that people with cognitive symptoms were about five times more likely to donate their brains, so researchers adjusted for donation bias. Outside expert Russell Lonser cautioned that the model includes early changes that may never have caused symptoms. The estimate does not measure current players’ risk.
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