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% 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, particulary during and after the COVID-19 pandemic.