Neurodivergence research highlights co-occurrence of autism and ADHD

Medical professionals and researchers are increasingly recognizing the co-occurrence of autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD), a dual diagnosis often referred to informally as “AuDHD”. While not an official standalone diagnosis, the term describes individuals whose neurodivergent traits may appear contradictory, such as a need for routine from autism paired with a need for novelty from ADHD.

Research indicates a significant overlap between the two conditions. Some studies suggest that 50% to 70% of individuals with autism also have ADHD, while a Healthwatch poll of adults in England found that 45% of those with suspected or diagnosed ADHD also identified as having autism. This marks a shift from historical diagnostic standards; prior to 2013, the Diagnostic and Statistical Manual of Mental Disorders ruled out a dual diagnosis.

Clinical experts emphasize that effective ADHD evaluations often require multiple sources of information, such as input from spouses, parents, or educators, because individuals with ADHD may struggle with self-monitoring. This collaborative approach helps provide a more accurate clinical picture, especially for those who have lived with undiagnosed symptoms for many years.