In North America and Europe, it is estimated that three to five percent of<unk> s have<unk> . Of those<unk> s with<unk> , an estimated 10% of those have received a formal diagnosis. It has been estimated that 5% of the global population has<unk>  (including cases not yet diagnosed). In the context of the World Health Organization World Mental Health Survey Initiative, researchers screened more than 11,000 people aged 18 to 44 years in ten countries in the Americas, Europe and the Middle East. On this basis they estimated the<unk> <unk>  proportion of the population to average 3.5 percent with a range of 1.2 to 7.3 percent, with a significantly lower prevalence in low-income countries (1.9%) compared to high-income countries (4.2%). The researchers concluded that<unk> <unk>  often co-occurs with other disorders, and that it is associated with considerable role disability. Although they found that few<unk> s are treated for<unk>  itself, in many instances treatment is given for the co-occurring disorders.
Adult attention deficit hyperactivity disorder
Attention deficit hyperactivity disorder
Tourette syndrome
Motivational deficiency disorder
Obsessive–compulsive disorder
Conduct disorder
Oppositional defiant disorder
Frontal lobe disorder