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Study: Taller men may have lower dementia risk in old age

Study: Taller men may have lower dementia risk in old age


They found that the relationship between height and dementia also existed when they looked at brothers with different heights, suggesting that genetics and family characteristics alone do not explain why shorter men had a greater dementia risk.

"A key strength of our study is that it adjusted for the potential role of education and intelligence in young men's dementia risk, both of which may build up cognitive reserve and make this group less vulnerable to developing dementia," said study senior author Merete Osler. 'Cognitive reserve' refers to the brain's ability to improvise and solve problems that come up in everyday life.

Adjusting for education and intelligence reduces the likelihood that the relationship between height and dementia is really explained by cognitive reserve, the researchers said. "Together, our results point to an association between taller body height in young men and a lower risk of dementia diagnosis later in life, which persists even when adjusted for educational level and intelligence test scores," Osler said.

"Our analysis of the data concerning brothers confirms these findings, and suggests the association may have common roots in early-life environmental exposures that are not related to family factors shared by brothers," she added.

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