Background: There is a consensus that both nonsuicidal self-injury (NSSI) and suicidal ideation as risk factors for suicidal behavior have a strong connection. However, a lack of longitudinal information has limited the clarification of the concrete relationship between them.

Aims: This study aimed to examine the specific mechanism between NSSI and suicidal ideation over time, during adolescence.

Method: A longitudinal study was conducted with 193 Chinese adolescents. NSSI and suicidal ideations were examined over the course of a 1year followed-up, and three waves of data were collected.

Results: The NSSI at time T1 significantly positively predicted suicidal ideation at time T2; Suicidal ideation at time T2 also significantly positively predicted NSSI at time T3.

Limitations: Given that the small number of participants with suicidal ideation and NSSI, the findings of the study should be interpreted with caution and a lager sample is needed in the future.

Conclusion: It was suggested that NSSI may occur before suicidal ideation, which in turn would strengthen NSSI, so interventions should be carried out from two aspects (behaviors and thoughts) to improve adolescents' mental health.

Keywords: Chinese adolescents; cross-lagged regression; longitudinal study; nonsuicidal self-injury; suicidal ideation.

Copyright © 2024 Xu, Li, Kong, Lin, Liu, Zhang, He and Zhao.

背景：

目前普遍认为，非自杀性自伤（NSSI）和自杀意念作为自杀行为的风险因素之间存在强烈联系。然而，缺乏纵向信息限制了对两者具体关系的澄清。

目的：

本研究旨在探讨青少年时期NSSI与自杀意念之间的特定机制。

方法：

本研究采用纵向设计，共招募193名中国青少年。在为期一年的随访中，收集了三次数据，分别评估了NSSI和自杀意念的发展情况。

结果：

T1时的NSSI显著正向预测T2时的自杀意念；T2时的自杀意念也显著正向预测T3时的NSSI。

局限性：

由于具有自杀意念和NSSI的参与者数量较少，研究结果需谨慎解读，并在未来需要更大规模样本的研究。

结论：

研究表明，NSSI可能先于自杀意念发生，而后者又会加强NSSI。因此，应从行为和思维两个方面开展干预措施，以改善青少年的心理健康状况。

关键词：

中国青少年；交叉滞后回归分析；纵向研究；非自杀性自伤；自杀意念。

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