Oppositional defiant disorder (ODD) is defined by aggressiveness and a tendency to purposefully bother and irritate others. While it is true that anybody can be aggressive and irritating from time to time, to be diagnosed as ODD, a person must display a pattern of negativistic, hostile, and defiant behavior lasting at least six months.Some sources estimate that 5 percent of all children may qualify for the diagnosis.Not all children with attention deficit hyperactivity disorder (ADHD or ADD) qualify for the oppositional defiant disorder diagnosis.
However, the percentages are high — some studies put estimates as high as 65 percent of kids with ADHD who also have a defiance disorder.
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