lol neither of the studies you quoted are researching the rates of ADHD, like at all. The one study is a narrative review and the other I couldn’t get into but on mobile.
This was literally just setting the stage for their hypothesis…
You would need to find a meta-analysis or systemic review of current research. The article you are quoting is just framing the paper around 15%.
In this narrative review we search the extant literature and discussed a brief overview of the aetiology and prevalence of NDEBID, enumerate common problems associated with current classification systems and provide recommendations for a more integrated approach to the nosology and clinical care of these related conditions.
Also, quoting a single study and framing your world view based on one study is absolutely not science, but have at it…