science2 distinct publishers
The 25% CTE figure rests on 338 donated brains out of 1,712 NFL deaths
The BMJ study's range runs from 24.5% to 97.7% because 1,374 of those brains were never examined. That width reflects who donates, not how common the disease is.
Reality
- Evidence66
- Adoption30
- Hype gap+28
- Incentives55