25% of Adults Suspect Undiagnosed ADHD SlashdotAttention-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 Suspected by 1 in 4 American Adults, Survey Finds Newsweek