ADHD was historically considered a childhood condition, but it is now recognized as a lifelong condition that persists well into adulthood. Persistence rates, however, vary, ranging from 6% to 30%0 and perhaps even higher. Individuals with ADHD may receive a diagnosis in childhood or well into adulthood. Trends show a rise in rates of ADHD diagnoses among adults in the last decade.
Still, many adults with ADHD never receive a diagnosis in their lifetimes. Scientists believe ADHD is significantly underdiagnosed in adults