{"rewrite":{"id":"r_27f8217404400044835a42b7","clusterId":"c_896e6c8bb9e45afd4b0cf91e","slug":"boston-university-study-estimates-75-of-deceased-former-nfl-players-had-cte","model":"deepseek-v4-1-flash","headline":"Boston University Study Estimates 75% of Deceased Former NFL Players Had CTE","summary":"A Boston University-led team announced in late October 2026 that about 75% of former NFL players who died between 2008 and 2023 showed signs of CTE, the dementia-like condition linked to repeated blows to the head. The estimate rests on brain data from 387 donated brains plus statistical correction for the bias that has dogged earlier donation-based figures.","whyItMatters":"The bias-corrected estimate puts the prevalence at roughly three times the one-in-four figure from earlier work, which is the number the beat will now have to argue against.","webCardHtml":"\u003cp\u003eThe analysis covered 2,362 former NFL players who died between 2008 and 2023. Of the 387 whose brains were donated for research, 93% showed signs of CTE. The team led by Yorgos Tripodis, statistics and data management director at the Boston University Alzheimer\u0026#39;s Disease and CTE Center, added age at death and estimated rates of mild cognitive impairment and dementia among former players aged 50 and older to correct for donation bias.\u003c/p\u003e\u003cp\u003eThe corrected figure comes to about 74.5%, or roughly 1,760 players. Earlier donation-based studies drew criticism because people with cognitive decline, or their families, are more likely to donate a brain or request an autopsy.\u003c/p\u003e","blueskyPost":"The Boston University figure corrects for donation bias instead of just counting donated brains. That correction is what turns 387 samples into a population estimate, and it is the part earlier CTE counts lacked.","twitterPost":"Boston University's 75% CTE estimate corrects for donation bias rather than counting donated brains alone. The statistical adjustment carries the claim.","threadsPost":"Boston University's 75% figure rests on 387 donated brains, but the number that does the work is the statistical correction for donation bias. Donated brains skew toward players families suspected something was wrong, so the adjustment is what lets 387 samples stand in for a population.","newsletterBlurb":"A Boston University-led team estimates about 75% of former NFL players who died between 2008 and 2023 had CTE. The figure comes from 387 donated brains plus statistical correction for donation bias, and it runs about three times the earlier one-in-four estimate.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20261109-nfl-cte/\",\"title\":\"Study reveals 75% of former NFL players who died over the past 15 years had chronic traumatic encephalopathy (CTE)\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":5570,"outputTokens":670,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1794230308,"createdAt":"2026-11-09T13:13:01.000Z","publishedAt":"2026-11-09T13:17:26.000Z","updatedAt":"2026-11-09T13:17:26.000Z"},"cluster":{"id":"c_896e6c8bb9e45afd4b0cf91e","canonicalTitle":"過去15年間で死亡した元NFL選手の75％が慢性外傷性脳症(CTE)を患っていたことが調査で明らかに","representativeArticleId":"a_987b397c1f0ac15e0fb24d87","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-11-09T12:37:00.000Z","lastSeenAt":"2026-11-09T12:37:00.000Z","updatedAt":"2026-11-09T13:17:26.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20261109-nfl-cte/","title":"過去15年間で死亡した元NFL選手の75％が慢性外傷性脳症(CTE)を患っていたことが調査で明らかに"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"news","domain":"other","is_roundup":false},"keyFacts":["A Boston University-led team announced the estimate in late October 2026.","About 75% of former NFL players who died between 2008 and 2023 showed signs of CTE.","Of 387 donated brains, 93% showed signs of CTE.","The corrected estimate is about 74.5%, or roughly 1,760 players.","Earlier studies estimated one in four former NFL players had CTE."],"pageLinks":{"healthSlugs":[],"storySlugs":[],"entities":[],"stories":[],"entitiesOk":true,"storiesOk":true}}