18-Year Study Links Childhood ADHD to 60% Worse Adult Outcomes, as Siblings Largely Match Controls
Updated
Updated · PsyPost · Jul 26
18-Year Study Links Childhood ADHD to 60% Worse Adult Outcomes, as Siblings Largely Match Controls
3 articles · Updated · PsyPost · Jul 26
Summary
Adults diagnosed with ADHD in childhood scored worse than controls on more than 60% of measures after 17.6 years, spanning mental health, cognition, education, sleep and daily functioning.
Among 154 adults with childhood ADHD, 45% still met adult ADHD criteria and 18% had major depressive disorder, versus 8% of controls and 6% of siblings.
Persistent ADHD carried the highest risks for depression, internalizing problems, severe stress and poor sleep, while remitted cases still showed lower education and weaker working memory and verbal fluency.
The sibling group—138 adults without childhood ADHD—looked broadly similar to 129 controls, suggesting many long-term difficulties are tied more to ADHD itself than shared family environment.
Researchers said outcomes varied widely and most adults with childhood ADHD functioned comparably to controls, though the Netherlands-only sample and participant dropout limit how broadly the findings apply.