ADHD

The required number of inattentive and/or hyperactive-impulsive symptoms persist for at least 6 months at a developmentally inconsistent level.

Timing requirement

Frequency + duration

Symptoms persist ≥6 months

Timing in context

Several symptoms must be present before age 12, occur in at least 2 settings, and interfere with functioning. The threshold is 6 symptoms per domain through age 16 and 5 at age 17 or older.

Sources and review

Last content review: August 21, 2026 · PsychDB ↗