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Getting the latest healthcare news for you
A new BMJ study reveals that at least 24.5% of former NFL players who died between 2016 and 2021 had chronic traumatic encephalopathy (CTE) — compared to less than 1% in the general population. Of brain donors studied, a striking 93.2% had CTE. Researchers say the true prevalence is almost certainly higher, and are calling for reduced repetitive head impacts — not just concussion management — as the key prevention strategy.
A major new study published in The BMJ found that at least 24.5% of former NFL players who died between 2016 and 2021 had chronic traumatic encephalopathy (CTE) at death — a figure researchers say is almost certainly an undercount. The study, led by Dr. Daniel Daneshvar of Mass General Brigham, examined 1,712 former NFL players who died between 2008 and 2021, with 338 donating their brains for analysis.
Among brain donors, 93.2% had a CTE diagnosis, and 30.8% had the most severe form — stage IV CTE. Critically, 61.3% of donors with CTE met clinical criteria for dementia, underscoring that this isn't just a pathological finding — it translates to real, life-altering cognitive decline.
By the Numbers:
Why it matters: CTE risk is tied to cumulative repetitive head impacts — not just diagnosed concussions. With nearly 70% of head impacts occurring during practice, experts say limiting contact drills could meaningfully reduce risk, especially for youth athletes whose exposure begins years before they reach professional play.
