Acute Emotional Impact of Peer Suicide and Student-Related Factors.

Objective: This study explored the negative emotional impact of peer suicide on adolescent students during the early stages of becoming aware of suicide and examined the adverse effects of related environmental and mental health factors.

Methods: This study was conducted from March 1, 2020 to December 31, 2021, targeting students enrolled in middle and high schools where student suicide occurred. Emotional impact was assessed using the Korean version of the Impact of Event Scale-Revised (IES-R-K), State-Trait Anxiety Inventory-X, Center for Epidemiologic Studies-Depression Scale (CES-D), and Beck's Scale for Suicide Ideation (SSI). χ2 test and Pearson's correlation analysis were performed to analyze subgroup differences and explore relationships between scale scores, respectively.

Results: Of the 2,382 participants, 25.1% belonged to the post-traumatic stress disorder (PTSD) or PTSD tendency group on the IES-R-K, and 22.2% showed abnormalities in the State-Trait Anxiety Inventory-State. Students in the same class as the deceased student and those in the same grade but in different classes had higher risk rates than those in different grades. Boarding school students had 1.9 times higher odds of experiencing emotional impacts than non-boarding students. On the CES-D, 10.4% of the students showed potential depression, with 3.7 times higher odds of experiencing emotional impact than those with normal scores. Moreover, 4.5% of the students reported suicidal ideation on the SSI, with those experiencing mild suicidal ideation having 1.9 times higher odds of experiencing emotional impact than those with normal scores.

Conclusion: A significant proportion of students experienced negative impacts of peer suicide. Students in close-knit environments, such as the same class, grade, and boarding school as the deceased, or those with depression or anxiety experienced a more pronounced negative impact.