Repetitive non-suicidal self-injury (R-NSSI) in adolescence represents a significant risk factor for suicide. Although exposure to family stress is robustly associated with the risk of non-suicidal self-injury (NSSI), studies have not examined the potential mechanisms linking different forms of family stress and R-NSSI. This study examined how unique dimensions of family stress (threat and deprivation) relate to R-NSSI via interactions between impulsivity and emotion dysregulation. The current sample included 3801 middle-school adolescents (42.2 % girls, = 13.21 years). We conducted a two-wave study with 6-month intervals. Participants completed self-report measures assessing family stress, impulsivity, emotion dysregulation, and NSSI. Moderate mediation analyses showed that threat was indirectly associated with NSSI frequency through the interaction of impulsivity and emotion dysregulation in the R-NSSI group and indirectly through impulsivity in the occasional NSSI (O-NSSI) group. Deprivation did not predict subsequent NSSI frequency in either group. These findings lend empirical support to dimensional models of adversity and suggest that adolescents who experience threat-related family stress may have greater impulsivity and are more likely to report R-NSSI in the context of emotion dysregulation.

中文翻译：

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青春期家庭压力和重复性非自杀性自残的维度：检查冲动和情绪失调的相互作用

青春期重复性非自杀性自伤（R-NSSI）是自杀的一个重要危险因素。尽管家庭压力与非自杀性自伤 (NSSI) 风险密切相关，但研究尚未探讨不同形式的家庭压力与 R-NSSI 之间的潜在机制。这项研究探讨了家庭压力（威胁和剥夺）的独特维度如何通过冲动和情绪失调之间的相互作用与 R-NSSI 相关。当前样本包括 3801 名中学生（42.2% 为女孩，= 13.21 岁）。我们进行了两次间隔 6 个月的研究。参与者完成了评估家庭压力、冲动、情绪失调和 NSSI 的自我报告措施。中等中介分析表明，在 R-NSSI 组中，威胁通过冲动和情绪失调的相互作用与 NSSI 频率间接相关，而在偶尔 NSSI (O-NSSI) 组中，威胁则通过冲动与 NSSI 频率间接相关。剥夺并不能预测两组随后的 NSSI 频率。这些发现为逆境的维度模型提供了实证支持，并表明经历与威胁相关的家庭压力的青少年可能更容易冲动，并且在情绪失调的情况下更有可能报告 R-NSSI。