The aim of the proposed study is to provide information regarding potential adverse outcomes associated with trauma exposure and posttraumatic stress symptoms (PTSS). Existing data suggest that youth trauma exposure and/or PTSS are associated with adverse outcomes in several domains including: substantially increased odds of objective physical disease states (Seng et al, 2004); poorer educational attainment (Hurt et al, 2000); engagement in substance use and other risky behaviours (Begle et al, 2011); and increased likelihood of antisocial behaviours/involvement in the youth juvenile justice system (Ford et al, 2010; Abram et al, 2004). However, existing studies are predominantly cross-sectional raising issues of cause versus consequence; or they have focused on specific populations or types of trauma, limiting the generalisability of the findings. The longitudinal data afforded by the ALSPAC cohort would allow for an analysis of whether youth trauma and PTSS contribute to later adverse outcomes, even once concurrent problem levels are taken account of.