Which diagnostic criteria must be met for ADHD according to the DSM-5?

The diagnostic criteria for ADHD as outlined in the DSM-5 state that symptoms must be present for at least six months to ensure that they are not only transient behaviors but are indicative of a persistent pattern of inattention and/or hyperactivity-impulsivity that significantly impacts daily functioning. This time frame allows clinicians to differentiate between temporary developmental behaviors and those that constitute ADHD.

Additionally, the requirement that symptoms occur in two or more settings, such as home and school, is vital for establishing that the symptoms are pervasive and not limited to a single environment. If symptoms could be specifically limited to one context without manifesting in others, it would be challenging to accurately diagnose ADHD.

Thus, while the duration of symptoms is a critical part of the diagnostic criteria, the multifaceted nature of where symptoms must be observed also plays an essential role in establishing the diagnosis.