The present findings should be interpreted in the context of several study-specific limitations. First, the cross-sectional nature of the survey limits our ability to document temporal ordering of mental disorders and putative risk and protective factors. Second, assessment of lifetime disorders is based on retrospective recall that is subject to numerous types of bias. Although we employed a number of methods to increase the validity of retrospective reports of age of onset,21 it is unlikely that we were able to completely correct for recall biases. A third limitation is that surrogate information was obtained only from one parent using a self-administered questionnaire rather than a direct interview, and only for a limited number of disorders assessed in the survey. The lack of prior evidence for integrating parent and child reports based on different modes of administration led us to apply an empirical approach based on previous research on cross-informant diagnostic estimates.23 In addition to study-specific limitations, a critical view is warranted concerning current diagnostic nomenclature more generally. Adolescence is a period of change and maturation in which emotional and behavioral
