Study Finds CTE in Quarter of Deceased Former NFL Players

Study Finds CTE in Quarter of Deceased Former NFL Players

Updated at: August 26, 2026 at 02:15 AM

A recent study published in The BMJ has shed new light on the health risks facing former NFL players.

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By examining the brains of athletes who passed away between 2016 and 2021, researchers discovered that at least 24.5%—roughly one in four—suffered from Chronic Traumatic Encephalopathy (CTE).

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Daniel Daneshvar describes this figure as a conservative estimate, noting that the true prevalence could potentially be much higher.

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Because CTE can only be definitively diagnosed after death, this study helps bridge the gap between small-sample brain bank research and the broader population of deceased players.

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The findings also reveal a stark correlation between CTE and cognitive decline; among those with the condition, 61.3% showed symptoms of dementia, with that number rising to over 90% in the most severe cases.

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While this study cannot track the health of living players, it has triggered urgent calls for increased player safety and further research into potential treatments for this life-altering condition.

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Challenge Mode

Comprehension Questions

What is the minimum percentage of deceased former NFL players found to have CTE in this study?

✓

Correct Choice

24.5%

Why is it difficult to determine the exact number of CTE cases among all former NFL players?

✓

Correct Choice

CTE can only be definitively diagnosed after a person has died.

What is the relationship between CTE and dementia according to the study?

✓

Correct Choice

There is a strong correlation, with 61.3% of CTE patients meeting clinical criteria for dementia.

How do researchers characterize the 24.5% statistic?

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Correct Choice

It is a conservative or low-end estimate.

What is the comparison made regarding the prevalence of CTE in the general population?

✓

Correct Choice

It is less than 1%.

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