Adolescent Self-Poisoning Decision-Making Behavior: A Qualitative Study Using the Theory of Planned Behavior

Purpose To explore factors related to adolescents' self-poisoning decision-making behavior based on the Theory of Planned Behavior (TPB). Method A qualitative descriptive research design was used, and research questions were developed based on the TPB. Thirteen adolescents from a tertiary hospital were selected using purposive sampling for semi-structured interviews. Transcribed data were analyzed using content analysis. Results Three themes and eight subthemes were identified: Behavioral Attitudes (tolerant attitudes, conflicting attitudes), Subjective Norms (peer influence, filial piety and responsibility, masculine traits), and Perceived Behavioral Control (acquired suicide capability, cognitive distortion and impairment, perceived social support). Conclusion Findings provide unique insights into understanding adolescent suicide behavior. This study also identified new intervention targets for clinical professionals in preventing adolescent self-poisoning behavior. [ Journal of Psychosocial Nursing and Mental Health Services, xx (xx), xx–xx.]