This study is fascinating...children with ADHD are twice as likely to have a dna sequence that either duplicates or is missing chunks of DNA. This is very similar to the DNA sequence seen with Autism and schizophrenia.

The study was done in London and involved children of European Caucasian descent.

In the long term, then, this could mean that the environment during the late stage of development of the brain is impacting the dna sequencing. Which means it might be able to be reversed or prevented.