Approximately one in five boys and one in ten girls in GSMS met criteria for ODD and/or CD at some point between the ages of 9 and 16 years – cumulative prevalence estimates close to those reported retrospectively by adults in the NCSR (Nock, Kazdin, Hiripi, & Kessler, 2006; Nock et al., 2007). Our first aim was to examine developmental associations between these two disorders, and in particular, to evaluate DSM-IV’s assumption that in ‘…a significant proportion of cases…’ (p. 92) ODD will constitute a developmental precursor to CD.
