Prolonged education may not have a protective effect against dementia – News-Medical.Net

The state of knowledge seemed clear: school education protects against dementia. Every school year is supposed to reduce the risk of developing dementia in later life by up to seven percent. Researchers at the University of Duisburg-Essen (UDE) have shown quite some perseverance and have now refuted this causal connection. Their work is based on a school reform that extended schooling in Sweden 80 years ago. The American Journal of Epidemiology covers this in its current issue.

Education was considered a promising factor that could actively reduce the risk of dementia. And indeed there is a correlation: Alzheimer’s and similar diseases affect people with a low level of education more often than university graduates. But is it really education itself that has a protective effect?

Not necessarily, according to the research group led by UDE’s Professor Martin Karlsson. For years he and his colleagues combed through archives for information on the reform of the Swedish elementary school between 1930 and 1950, when compulsory education was gradually extended from six to seven years nationwide.

This is exactly the point. It was mandatory for all 13-year-olds, regardless of intelligence, character, social environment or other factors that normally affect the decision on how long to go to school.”

Martin Karlsson, Professor, UDE

The researchers compared the different educational lengths with dementia diagnoses of 1.3 million people born between 1920 and 1936.

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