Attention-deficit hyperactivity disorder (ADHD) was associated with Alzheimer’s disease (AD) and any dementia within families. The association strength was reduced as genetic relatedness decreased.
Why this matters
Several studies have suggested an association between ADHD and AD, but results have been conflicting.
This large population-based study underlines the importance of further research into ADHD pathophysiology and cognitive decline in older age, in order to unravel the potential shared genetic mechanisms between these two conditions.