Five-year predictive validity of DSM-IV conduct disorder research diagnosis in 4(1/2)-5-year-old children.

Objective: This longitudinal study of a non-referred, population-based sample tested the 5-year predictive validity of the DSM-IV conduct disorder (CD) research diagnosis in children 4(1/2)-5 years of age.

Method: In the E-Risk Study, a representative birth cohort of 2,232 children, mothers were interviewed and teachers completed mailed questionnaires to assess children's past 6-month CD symptoms. A follow-up assessment was conducted when children were 10 years old.