NSSI is a robust predictor of suicidal thoughts and behaviors. Despite this close link, there is a lack of information regarding specific behavioral and psychological features of NSSI that may influence, or serve as drivers, of these relationships. Consequently, the aim of the current study was to elucidate the specific NSSI-related mechanisms that may confer risk for suicide ideation and suicide attempts. Participants having a lifetime history of NSSI (N = 659) were included in the current study and completed a series of online questionnaires. Exploratory mediation analysis was utilized to simultaneously examine 28 behavioral and psychological NSSI features as potential mechanisms of the NSSI-suicide ideation and NSSI-suicide attempt relationships. Results identified 11 NSSI features as having non-zero specific indirect effects in the NSSI-suicide ideation relationship, with the antisuicide function of NSSI having the strongest influence. In examining the NSSI-suicide attempt relationship 12 NSSI features were identified as having non-zero specific indirect effects, with endorsement of swallowing dangerous substances as an NSSI method having the strongest influence. These findings suggest psychological and behavioral features of NSSI may differentially impact risk for suicide ideation and suicide attempts, respectively.

NSSI是自杀思想和行为的有力预测指标。尽管存在这种紧密的联系，但仍缺乏有关NSSI特定行为和心理特征的信息，这些信息可能会影响或充当这些关系的驱动力。因此，当前研究的目的是阐明与NSSI相关的特定机制，这些机制可能会给自杀意念和自杀未遂带来风险。有NSSI一生历史的参与者（N = 659）被纳入当前研究并完成了一系列在线调查问卷。探索性调解分析被用来同时检查28种行为和心理NSSI特征，作为NSSI自杀观念和NSSI自杀未遂关系的潜在机制。结果确定了11种NSSI特征在NSSI-自杀观念关系中具有非零的特定间接影响，其中NSSI的抗自杀功能影响最大。在检查NSSI与自杀未遂的关系时，确定了12种NSSI特征具有非零的特定间接影响，并且认可吞咽危险物质是影响最大的NSSI方法。