25% of Adults Suspect Undiagnosed ADHD Neuroscience NewsAttention-Deficit/Hyperactivity Disorder Diagnosis, … CDCADHD: Misunderstood, underdiagnosed—and treatable Medical Xpress1 in 4 US adults suspect they have undiagnosed ADHD: ‘Their parents didn’t believe’ New York Post ADHD now affects 15.5 million US adults, says new CDC report Fox News