The median 12-month prevalence rate of disruptive behavior disorders (ie, conduct disorder [CD] or oppositional defiant, disorder [ODD]) is 6% with a range from 5% to 14%.8 The prevalence rates of CD and ODD based on DSM-IV criteria in recent, studies can be found in Table V. Estimates of current, or point prevalence in the UK are 2.3% for ODD and 1.5% for CD,59 whereas somewhat higher rates were found in recent U.S. studies with ranges of 2.8% to 5.5% for ODD and 2.0% to 3.32% for CD.14-15 Similar to ADHD, CD is also more prevalent in boys than girls, with many studies showing a difference of 3 to 4 times higher for boys. The prevalence difference between boys and girls for ODD is less clear. Some studies find higher rates in boys, but others find very similar rates between boys and girls.63
