Environmental and lifestyle interventions are an important way to reduce the burden of cancers. Through the identification of subgroups of adolescents with distinct patterns of MCRB, this research will differentiate between normative and sustained risk taking. By conducting analysis with respect to cancer related adverse health outcomes at age 25 years, it will pinpoint young people at greatest risk of developing lifelong patterns of cancer-causing risk behaviours. Further, by identifying the antecedents of membership to these subgroups, it will focus prevention and intervention strategies on those at greatest risk, inform the age at which an intervention should be applied and determine whether it is universal or targeted. Creating a new measure in ALSPAC of longitudinal patterns of cancer-risk behaviours, which once derived can be used by other researchers. Multiple research outputs, including conference presentations and papers.