Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 54 5 2025 04 30 974 984 Baskoro Setioputro Department of Emergency and Critical Nursing, Faculty of Nursing, Universitas Jember, Jember, Indonesia Windi Rohmatun Nabilah Postgraduate Nursing Student, Faculty of Nursing, Universitas Jember, Jember, Indonesia Nur Apriliani Postgraduate Nursing Student, Faculty of Nursing, Universitas Jember, Jember, Indonesia Rismawan Yunanto Department of Emergency and Critical Nursing, Faculty of Nursing, Universitas Jember, Jember, Indonesia Ruris Haristiani Department of Emergency and Critical Nursing, Faculty of Nursing, Universitas Jember, Jember, Indonesia 2024 05 07 2024 11 25 Background: Indonesia is known as the home of disasters and this condition threatens the safety of the Indonesian people. Strengthening community capacity is still not optimal and school-based programs need to be carried out to prepare the younger generation to face earthquakes. This study aimed to analyze the effect of the school-based program on improving disaster preparedness (SBPIDP) among Indonesian adolescents in the earthquake risk area. Methods: A randomized control trial was performed among 140 (INT=70; CON=70) adolescents in Indonesia in 2022. The SBPIDP lasted for 10 wk providing eight sessions of education and training activities. Data collection tools included a three-part questionnaire that consisted of demographics, knowledge, and self-efficacy for earthquake preparedness. The inter-group and intra-group differences were evaluated using paired t-test analysis, and analysis of variance (ANOVA) used to assess intervention effectiveness. Results: There were significant differences in disaster preparedness among adolescents after the SBPIDP program was implemented after follow-up in the 10th week (knowledge (P=0.001) and self-efficacy (P=0.001)). The intervention group showed better preparedness than the control group during the follow-up period. Conclusion: The SBPIDP program can significantly improve disaster preparedness among Indonesian adolescents in earthquake-risk areas.   https://ijph.tums.ac.ir/index.php/ijph/article/view/35428 https://ijph.tums.ac.ir/index.php/ijph/article/download/35428/8543