Five percent of all school children in Denmark show symptoms of ADHD. For adults, it is around three percent. ADHD is a neurodevelopmental disorder with onset in childhood. Two-thirds of children who are diagnosed with ADHD continue to have ADHD as adults. In other cases, ADHD is not diagnosed until adulthood. Researchers from the national psychiatry project iPSYCH have studied the genetic differences between people diagnosed during childhood and people diagnosed as adults. “We’ve found that the genetic architecture differs depending on how old you are when you get an ADHD diagnosis,” says Associate Professor Ditte Demontis who is behind the study.
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