ObjectivesZZThe purpose of this study was to investigate the manner by which social anxiety symptoms, self-esteem, and depression influence suicidal ideation in adolescents.MethodsZZThis study involved 1320 middle school students. All participants completed several self-assessment questionnaires. Correlations among variables were assessed, and multiple regression analysis was performed to evaluate the relationships between variables and suicidal ideation. Finally, a structural equation model was used to determine the pathways by which the tested variables can influence suicidal ideation.ResultsZZSymptoms of social anxiety were positively correlated with depression and suicidal ideation, but were negatively correlated with self-esteem. Additionally, multiple regression analysis revealed that social anxiety symptoms, depression, and self-esteem were significantly related to suicidal ideation. The influence of social anxiety symptoms on suicidal ideation was associated with an increase in depression, whereas self-esteem acted as an intermediary between social anxiety symptoms and depression.ConclusionZZThe results of the present study demonstrate that social anxiety symptoms can directly increase depression and lower self-esteem, which in turn can increase the risk of suicidal ideation. Thus, it may be possible to prevent depression and ultimately lower the risk of suicide in adolescents by pursuing programs designed for the early detection of social anxiety symptoms and by using intervention programs that improve self-esteem.J Korean Neuropsychiatr Assoc 2016;55(4):450-457 KEY WORDSZZ Adolescent · Social anxiety · Self-esteem · Depression · Suicidal ideation.

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Objectives: Suicide is the most frequent cause of death among Korean adolescents, and adolescents who have experienced trauma have an increased risk of post-traumatic stress disorder (PTSD) symptoms, depression, and suicide attempts. However, resilience and self-esteem are protective factors. We examined the effects of resilience and self-esteem on the relationship among traumatic experiences, PTSD symptoms, depression, and suicidal ideation. Methods: Middle-school students (n=403) completed questionnaires assessing traumatic experiences, PTSD symptoms, depression, suicidal ideation, resilience, and self-esteem. Path analysis was performed to investigate the mediating effects of PTSD symptoms, resilience, self-esteem, and depression on the relationship between trauma exposure and suicidal ideation. Results: Traumatic experience was positively correlated with PTSD symptoms, depression, and suicidal ideation. PTSD symptoms and depression were positively correlated with suicidal ideation. The relationship between traumatic experiences and suicidal ideation was mediated by PTSD symptoms, which had both direct and indirect effects on suicidal ideation; the indirect effect was mediated by resilience, self-esteem, and depression. Conclusion: Korean adolescents who had experienced trauma were more likely to develop PTSD symptoms, increasing their risk of depression and suicidal ideation. However, self-esteem and resilience may help protect against depression and suicidal ideation. Our findings could inform suicide prevention initiatives.