How common is it? The cases of children with Oppositional Defiant Disorder (ODD) are usually counted with those of Conduct Disorder, so it is difficult to get good statistics about the occurrence of this condition. However, it is estimated that between 5 and 15 per cent of school-aged children have ODD.[1]
Loeber, R, Burke JD, Lahey, BB, Winters A, Zera, M. 2000. Oppositional Defiant and Conduct Disorder: A Review of the Past 10 Years, Part I. Journal of the American Academy of Child & Adolescent Psychiatry; 39(12):1468-1484.