In this issue of JAMA Psychiatry, 2 large, longitudinal, population studies from Brazil1 and the United Kingdom2 propose a paradigmatic shift in our understanding of attention-deficit/hyperactivity disorder (ADHD). They conclude, not only that the onset of ADHD can occur in adulthood, but that childhood-onset and adult-onset ADHD may be distinct syndromes.
Faraone SV, Biederman J. Can Attention-Deficit/Hyperactivity Disorder Onset Occur in Adulthood?. JAMA Psychiatry. 2016;73(7):655-656. doi:10.1001/jamapsychiatry.2016.0400