This study aims to develop a comprehensive and evidence-based crisis prevention model for addressing non-suicidal self-injury (NSSI) behaviour among adolescents in GuangXi, China. The Design and Development Research (DDR) was used which includes three phases. The phase one is to understand the characteristics of adolescents' NSSI Behaviour and the need to prevent NSSI Behaviour; questionnaires and semi-structured interviews were used to investigate 2344 adolescents and 84 stakeholders in Guangxi. In phase two, literature analysis, semi-structured interviews and nominal group techniques were used to determine the main components of the NSSI crisis prevention model. Based on the opinions of 27 experts, the DEMATEL-TAISM method was used to construct the model. In phase three, the evaluation of 15 experts was collected. The focus group method was used to determine the evaluation index system of the model. The incidence rate of NSSI among adolescents in Guangxi was 17.9%, indica.....

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