Mediating role of post-traumatic stress disorder in post-traumatic growth in adults who experienced the 2017 Pohang earthquake

Abstract

Background: The largest earthquake recorded in Korea occurred in Pohang in 2017. This study aimed to investigate the mediating role of post-traumatic stress disorder (PTSD) on the relationship between earthquake exposure level and post-traumatic growth (PTG) in adults who experienced the earthquake. Methods: We used a cross-sectional survey via convenience sampling to collect data from 200 respondents 18 months after the earthquake. Results: PTSD was severe in individuals who were married, had no religious affiliation, lower income, and higher earthquake exposure. PTG was higher in older, married, and more religious respondents. PTSD and PTG had a positive relationship, with PTSD fully mediating the relationship between earthquake exposure level and PTG. Limitations: The Pohang earthquake, with limited damage to life and property, may have had different effects on exposed individuals than more destructive earthquakes. Additionally, this study used the Korean version of the Posttraumatic Growth Inventory; most of the participants reporting a religious affiliation were Christians, which may have affected the results. Conclusions: Exposure to the Pohang earthquake was strongly associated with PTSD, which indirectly affected PTG. Future research should focus on developing an adequate PTG tool for natural disaster victims, more extensively investigating PTSD and PTG, and analyzing PTSD and PTG in terms of the disaster type.