Intelligence quotient

1. Intelligence quotient lowers the risk of dementia in humans (OR 0.78 (95% CI 0.69-0.88) per 1-SD increase).

   “Higher IQ at 18 was associated with a lower risk of all-cause dementia (Odds ratio [OR] per one-SD increase in IQ= 0.78; 95% confidence interval [95% CI]= 0.69-0.88) at age 81.”

   Humans67 yearsn = 3,498

   Adolescent IQ and risk of dementia: a 67-year prospective study

   The journals of gerontology. Series A, Biological sciences and medical sciences·11 Mar 2026

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