The Association Between Media-Based Exposure to Nonsuicidal Self-Injury and Emergency Department Visits for Self-Harm

This study aimed to evaluate the association between media-based exposure to nonsuicidal self-injury (NSSI) and emergency department (ED) visits due to self-harm in Korea, specifically before and after the initial broadcast of the song Barcode, which has an explicit focus on NSSI.

We used the national emergency department information system to obtain data related to ED visits due to self-harm between January 1, 2014, and December 31, 2018. Using interrupted time series regression analysis, we assessed the monthly ED visits due to self-harm before and after the media-based exposure to NSSI on March 30, 2018. In addition, self-harm methods were assessed.

A total of 35,928,834 visits to ED were identified, of which 115,647 were due to self-harm. ED visits due to self-harm showed a significant step increase in the 10- to 14-year-old (β = 0.883, p = .001), 15- to 19-year-old (β = 2.941, p < .001), 20- to 24-year-old (β = 1.997, p = 0.002), and 25- to 29-year-old (β = 1.438, p = .029) age groups, before and after the media-based exposure to NSSI. The most pronounced increase was observed in male participants aged 20 to 24 years (β = 1.790, p = .012) and female participants aged 15 to 19 years (β = 5.158, p < .001). Self-harm by cutting has increased significantly in participants aged 10 to 29 years, and self-harm by poisoning has also increased significantly in participants aged 10 to 19 and 25 to 29 years.

ED visits due to self-harm increased significantly, especially in adolescents and young adults, following the exposure to NSSI. Responsible media reporting on NSSI and appropriate guidelines would help prevent a further increase in self-harm.

We worked to ensure sex and gender balance in the recruitment of human participants. We worked to ensure race, ethnic, and/or other types of diversity in the recruitment of human participants. The author list of this paper includes contributors from the location and/or community where the research was conducted who participated in the data collection, design, analysis, and/or interpretation of the work.