ADHD Suspected by 1 in 4 American Adults, Survey Finds NewsweekAttention-Deficit/Hyperactivity Disorder Diagnosis, ... CDC1 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 News1 in 4 adults suspect undiagnosed ADHD, survey finds Medical Xpress