"The co-occurrence is far more common than many realize. Across clinical and population-based studies, estimates suggest that roughly 50 to 70 percent of autistic people also meet criteria for ADHD, and that about 20 to 65 percent of people diagnosed with ADHD show clinically significant autistic traits, depending on sample and methodology."
"Until the DSM-5 was published in 2013, clinicians were not formally allowed to diagnose both together, which helps explain why so many people were only ever partially seen."
"What if ADHD captures the restless, scattered edges of your experience, yet quieter, more unyielding traits remain unexplained? Or what if autism deeply resonates with your sensory world and relational patterns, but other parts of your inner life—impulsive, understimulated, chaotically adaptive—feel confusing and unnamed?"
AuDHD describes individuals who are both autistic and ADHD, representing a significant co-occurrence that clinical language often fails to capture. Estimates indicate 50-70% of autistic people also meet ADHD criteria, while 20-65% of ADHD-diagnosed individuals show clinically significant autistic traits. Prior to DSM-5 in 2013, clinicians could not formally diagnose both conditions simultaneously, resulting in widespread underdiagnosis. Diagnostic overshadowing occurs when one condition masks the other, delaying accurate recognition by years. Many adults experience an "almost-but-not-quite" feeling, sensing their neurology doesn't fit single diagnostic categories. Understanding AuDHD as an interaction rather than merely summing two separate conditions fundamentally changes how individuals understand themselves and receive appropriate support.
Read at Psychology Today
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