Is ADHD diagnosis flawed? Younger children in a school year group are more likely to be diagnosed with ADHD globally
In 2019, I was the lead author of a paper titled Attention deficit hyperactivity disorder late birthdate effect common in both high and low prescribing international jurisdictions: a systematic review. We reviewed 22 studies from 13 countries covering over 15 million children, and found that it is normal for the youngest children in a school-year-group to be diagnosed with and ‘medicated’ for ADHD at a much higher rate than their older classmates. This ADHD late birthdate effect was typically strongest...