consequences of unintended pregnancy and STD. Although the Fast Track prevention program was effective in reducing antisocial behavior, no “spillover” effects reducing the early initiation of sexual risk and accompanying early initiation of substance use were detected. This study focused on the timing of initiation and hence these findings do not preclude the possibility of intervention effects on other aspects of sexual activity or substance use. However, the failure to delay initiation, as well as the developmental findings from the study, have implications for future research and indicate the challenges associated with developing effective prevention programming to reduce sexual risk among children with early-starting conduct problems.
