痴呆症 ― dementia

痴呆症の罹患率は学歴次第、というニュースです。


Researchers have found that individuals with ‘more' education are better equipped to stave off dementia.

These findings published in the Advanced Access online edition of the journal Brain on July 26 confirm a decade of past studies that have also concluded more schooling equals a decreased risk of suffering from dementia, defined as the "loss of intellectual functions" including memory, orientation, calculation, language, attention and thinking.
(Stay in school longer to avoid dementia. The Independent. July 26, 2010.)


同記事中では、学歴により痴呆症の発症が具体的に減少していることを示しているようですが、本当のところはどうなんでしょうか。