Is There a Late Occurrence of ADHD?

For kids, it's not even a matter of just, oh, you have six of those nine criteria. The question is, does it exist in multiple domains, right? So this is where if you're only hearing about this regulation or dysfunction in one domain, then you have to start thinking, wait, is this something else? Are there any other comorbid illnesses that we should be concerned about before we start to truly consider the diagnosis of ADHD and a new patient for us?