Objective: The present study sought to identify the structure of South Korean student bully and victim groups based upon longitudinal data, and the association of groups with socialecological based factors at the individual (age, sex, father and mothers' educational status, household income, aggression, depression, smoking, drinking, type of family structure), family (neglect, abuse), friend/peer (peer relationships, number of delinquent friends), and school (school activity, school rules, teacher relationship) levels.Method: Participants were 2,284 second year middle school students (50.5% male; Mage = 14.0 years old) who completed the Korea Children and Youth Panel Survey annually for three years.Results: Latent Class Analysis identified victims (4.5%), bullies (2.8%), bully-victims (1%), and uninvolved students (91.8%) across time. At the individual level, compared to uninvolved group, bully-victims and bullies were more likely to smoke and drink alcohol, all subgroups have higher levels of aggression, and bullies and victims were more likely to have depression. At the peer/friend level, victims reported poorer quality peer relationships, and both bully-victims and bullies reported having more delinquent friends. At the school level, victims and bullies reported being less likely to engage in school activities, and bullies and bully-victims reported being less likely to follow school rules.
Conclusion:Certain social-ecological variables are relevant risk factors associated with each group of adolescents in South Korea. Our findings call for a holistic intervention strategy which not only addresses bullying but also problems such as smoking and drinking, and depressive symptomatology.