Body surveillance was found to be positively associated with adolescent suicidal ideation. However, the underlying mechanism of how body surveillance affects suicidal ideation and sex differences in this relationship remains to be examined. The current study aims to investigate the potential mediating effects of body shame and self-criticism in the association between body surveillance and suicidal ideation, as well as sex differences in the model using a longitudinal design. A total of 1,653 Chinese adolescents (M_age = 16.77, SD_age = 0.84; 41.9% males) were followed over three waves, 2 months apart. Results indicated that body surveillance did not affect suicidal ideation directly, but through the mediation of self-criticism and the serial mediation of body shame and self-criticism. Sex differences also existed in the mediation model. These findings identified two mediation variables in the association between body surveillance and suicidal ideation in adolescence. Further interventions are needed to develop effective prevention and intervention strategies targeting adolescent body surveillance behaviors.

Keywords: Suicidal ideation; adolescents; body surveillance; self-criticism; sex differences.

身体监控与青少年自杀意念之间存在正相关关系。然而，身体监控如何影响自杀意念以及这种关系中的性别差异背后的机制仍需进一步研究。本研究旨在通过纵向设计探讨身体羞耻感和自我批评在身体监控与自杀意念关联中可能的中介作用，并分析该模型中的性别差异。共有1,653名中国青少年（平均年龄 = 16.77岁，标准差 = 0.84；男性占41.9%）参加了三次间隔两个月的数据收集。结果显示，身体监控并没有直接对自杀意念产生影响，而是通过自我批评的中介作用以及通过身体羞耻感和自我批评的连续中介路径间接产生的影响。在中介模型中也存在性别差异。这些发现确定了青春期身体监控与自杀意念关联中的两个中介变量。需要进一步制定有效的预防和干预策略以解决青少年的身体监控行为。

关键词：自杀意念；青少年；身体监控；自我批评；性别差异。