Cognitive ability in young adulthood and risk of dementia in a cohort of Danish men, brothers, and twins

We examined the association between cognitive ability in young adulthood and dementia in Danish men, brothers, and male twins.In total, 666,986 men born between 1939 and 1959 were identified for dementia diagnosis in national registries from 1969 to 2016. The association between cognitive ability from draft board examination and dementia was examined using Cox regression.During a 44-year follow-up, 6416 (0.96%) men developed dementia, 1760...