What age is indicative of ADHD onset?

The onset of Attention-Deficit/Hyperactivity Disorder (ADHD) is typically recognized when symptoms are present before the age of 12. This aligns with the diagnostic criteria set forth in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition), which specifies that symptoms must be observable in multiple settings and lead to functional impairment. Early identification is crucial for effective intervention and support.

Choosing an age threshold before 12 is important as earlier symptoms may be overlooked or misattributed to typical childhood behavior variations. However, establishing a clear timeframe acknowledges that the complexities of childhood development necessitate an understanding of behavioral patterns over a longer period. In contrast, identifying onset strictly before other specified ages does not encapsulate the broader spectrum of clinical observations that are inherent to properly diagnosing ADHD. Thus, the age requirement before 12 is the most accurate for diagnosis according to established guidelines.