| Background After earthquakes, adolescents often experience post-traumatic stress disorder (PTSS), which seriously affect their physical and mental health, but there is currently a lack of research on the effects of post earthquake loneliness, social support, and social media use on their PTSS. Objective To assess the level of PTSS among adolescents in this area after the September 16th Luxian earthquake in 2021, and to investigate the effects of loneliness, social support and social media use on PTSS, so as to provide a reference for the intervention of PTSS among adolescents after the earthquake. Methods Simple random sampling was used to select 2 522 adolescents affected by the earthquake on November 12, 2021, in Luxian County, Luzhou City, Sichuan Province. The Post-Traumatic Stress Checklist (PCL-5), Multidimensional Perceived Social Support Scale (MSPSS), UCLA Loneliness Scale Short Version (ULS-3), and Social Media Use Scale (SM-10) were used. Binary logistic regression was used to analyze the factors influencing the emergence of PTSS in post-earthquake adolescents. Results The presence of PTSS was detected in 91 adolescents. Binary logistic regression showed that social support from family members (OR=0.926, 95% CI：0.879~0.976) was a protective factor for PTSS among post-earthquake adolescents. Lack of companionship (OR=1.764, 95% CI: 1.141~2.727), feeling isolated (OR=2.037, 95% CI: 1.282~3.236), and viewing negative emotional reactions of disaster victims through social media (OR=1.615, 95% CI: 1.291~2.020) were risk factors for PTSS in post-earthquake adolescents. Conclusion Lack of companionship, feeling isolated, and viewing negative emotional reactions of victims through social media had a negative impact on PTSS among post-earthquake adolescents, while social support from family members had a positive impact on PTSS among post-earthquake adolescents. |