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One extra year of school cut dementia diagnoses decades later, NIH-funded study finds
In brief
A study funded by the U.S. National Institutes of Health (NIH) and published on October 23, 2026, in the Proceedings of the National Academy of Sciences offers some of the strongest evidence yet that education itself can lower the risk of dementia. Researchers from the University of Wisconsin–Madison and the University of Southern California looked at a 1972 law in England, Wales and Scotland that raised the minimum school-leaving age from 15 to 16. People who had to stay the extra year had fewer Alzheimer's and related dementia diagnoses up to 50 years later, and the effect was strongest for people with genes that raise their risk.
How the study worked
Scientists have long seen that people with more schooling tend to get dementia less often, but it has been hard to prove that school is the cause rather than other things, such as family income. The UK reform worked like a natural experiment: it applied to everyone born after September 1, 1957, and raised the number of students staying in school until 16 by 14%. The team compared medical data from more than 100,000 people in the UK Biobank, using medical histories, hospital records and death registries, and focused on diagnoses made before December 2022, when the oldest participants turned 65.
What they found
The extra year lowered dementia incidence over the following 50 years by 0.88%, which the NIH called a considerably large effect because overall dementia rates in the group were low. The benefit was biggest for people carrying gene variants linked to higher risk. The reform was also tied to better income and health, which may help explain the link. The authors urged caution because participants were only followed to age 65, and the gap could grow or shrink as they age. "There are few preventative options out there so even one could make a world of difference," said lead author Silvia Barcellos of UW–Madison.
VSH take: This is a nice reminder that what we do when we are young can pay off for a lifetime, and that genes are not destiny. Many readers will take it as one more reason to keep learning at any age. Keep your brain busy with our free Sudoku and space quiz, plan focused study sessions with the Pomodoro timer, or browse our study tools and exam guides.
ViralScopeHub is an independent news summary site and is not affiliated with the NIH, the universities involved or the UK Biobank. This is general news, not medical advice. The photo shows a typical classroom, not one from the study.
Why it matters
There are very few proven ways to lower dementia risk, and this study suggests that staying in school longer may be one of them, even for people with risky genes.
People also ask
What did the NIH-funded study find?
An extra year of compulsory schooling in the UK lowered dementia diagnoses up to 50 years later, with the biggest benefit for people at higher genetic risk.
Which school reform was studied?
A 1972 law in England, Wales and Scotland that raised the minimum school-leaving age from 15 to 16 for students born after September 1, 1957.
Does this mean school prevents dementia?
Not completely. It suggests education can lower risk, but participants were only followed to age 65, so the authors say the results should be read with caution.
Related free tools: Pomodoro Timer, Age Calculator
Sources
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