Classifications of Trauma Exposure and Their Associations With 3-Year Follow-up Psychological Symptoms Among Korean Victims of Disaster: A Latent Class Analysis

This study aimed to classify patterns of trauma exposure among disaster victims using latent class analysis (LCA) and to examine group differences in post-traumatic stress disorder (PTSD), anxiety, and depressive symptoms over 3 years. Data were obtained from a 3-year panel survey of Korean disaster victims (male = 461, female = 513) who responded to four types of trauma experiences: threatened death, injury or disease, witnessing injury or death, and loss of family or relatives in 2017. The LCA yielded three classes: the low-threat (66.1%), life-threat (29.4%), and multi-threat (4.5%) groups. One-way analysis of variance showed that the multi-threat group had the highest levels of PTSD, depressive, and anxiety symptoms in 2017, 2018, and 2019. Post-traumatic stress disorder symptoms significantly decreased between 2017 and 2018 in the life-threat and multi-threat groups. However, there were no differences between 2018 and 2019 in any groups. These results highlight the importance of early intervention during the proximal period after trauma, particularly in individuals exposed to multiple types of traumatic experiences.