Gargano LM, et al. - Information from enrollees of the World Trade Center Health Registry, who completed at least one adolescent (2006–2007 or 2011–2012) and adult survey (2011–2012 or 2015–2016), were investigated to study the relationship between 9/11-related adolescent behavioral problems on mental health outcomes in early adulthood. Using the adolescent-reported Strengths and Difficulties Questionnaire (SDQ), adolescent behavioral difficulties were evaluated. This investigation emphasized the need to intervene early with children exposed to traumatic events in order to deflect later adolescent and adult problem behaviors.