Idk man comparing my two kids, both on opposite ends of ADHD (one hyperactive/compulsive, one inattentive)...the hyperactive one is quite ODD and the inattentive one, aside from the ADHD-I tendencies, is probably one of the best behaved kids in the world.

Though I may be a bit biased.

I don't think it's nurture. I think ODD has a direct correlation to compulsive behaviors in ADHD-H/C kids. It's probably something they eventually (hopefully, god willing) grow out of...but also something that would probably turn into other dangerous/compulsive behaviors I'd have to keep an eye out for (like hypersexuality or addiction).

That kid just turned seven and I'm already having nightmares of being a granddad in less than 10 years.