Age at Diagnosis and Clinical and Genetic Profiles Among Adults With Attention-Deficit/Hyperactivity Disorder

CONCLUSIONS AND RELEVANCE: In this cross-sectional study of adults with ADHD, individuals first diagnosed with ADHD in adulthood showed a milder ADHD-like clinical and genetic profile than those diagnosed in childhood or adolescence, which may contribute to later recognition of the disorder. Nonetheless, adults diagnosed either as youths or adults exhibited profiles characteristic of ADHD relative to matched controls without ADHD, including substantial burden, supporting adult-diagnosed ADHD as…

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