A study led by researchers at University College London (UCL), the University of Liverpool, and King's College London has found that attention deficit hyperactivity disorder (ADHD) remains underdiagnosed in England, despite a significant increase in diagnoses in recent years. The research, published in July 2026, analyzed data from over 7 million primary care records.
The study reported that ADHD diagnoses rose from 0.6% of the population in 2000 to 2.1% in 2023. However, the researchers estimate that the actual prevalence of ADHD in England is around 3-4%, meaning many individuals are still not diagnosed. The increase was most pronounced among children and young adults, but diagnosis rates in adults remain low.
Lead author Dr. Doug McKechnie from UCL stated, 'Our findings suggest that while awareness and diagnosis of ADHD have improved, there is still a substantial gap between the number of people who have the condition and those who receive a formal diagnosis.' The study also highlighted disparities, with diagnosis rates lower among women and ethnic minorities.
The researchers call for improved access to diagnostic services and greater awareness among healthcare professionals to address the underdiagnosis. They note that untreated ADHD can lead to difficulties in education, employment, and social relationships.
