School of Psychology, Victoria University of Wellington, New Zealand.
School of Psychology, Victoria University of Wellington, New Zealand; Child and Adolescent Mental Health Service, Capital and Coast District Health Board, New Zealand.
J Affect Disord. 2021 Mar 1;282:1247-1254. doi: 10.1016/j.jad.2020.12.201. Epub 2021 Jan 6.
We consider whether nonsuicidal self-injury (NSSI) thoughts - in the absence of any NSSI behaviour - are associated with suicidal thoughts and behaviours among adolescents, before examining whether characteristics of NSSI behaviour are associated with greater suicidal thoughts and behaviours.
Adolescents (n = 2,057, M age =15.56) recruited from secondary schools reported their lifetime history of NSSI, suicidal thoughts and behaviours, NSSI characteristics, and NSSI functions. Receiver Operating Characteristic analysis test whether NSSI status and characteristics of NSSI behaviour are diagnostic of clinically elevated suicidal thoughts and behaviours (a score of 7 or higher on the Suicide Behaviours Questionnaire-Revised). Regression models test whether NSSI functions predict greater suicidality.
Adolescents with NSSI thoughts and those with NSSI behaviour were more likely to report lifetime suicidal ideation and past-year suicide plan(s) than adolescents with no history of NSSI. In addition, adolescents with a history of NSSI were more likely to report a lifetime history of suicide attempt(s) as well as past-year suicide attempt(s) than adolescents with no history of NSSI. A greater number of NSSI methods, requiring medical assistance for NSSI injuries, and engaging in NSSI for self-punishment, anti-suicide, and sensation-seeking functions were associated with greater severity of suicidal thoughts and behaviours.
Data are cross-sectional, limiting inferences about causality.
Findings emphasize the importance of NSSI thoughts and characteristics of NSSI behaviour in understanding the complex relationship between NSSI and suicidal thoughts and behaviours among adolescents.
我们考虑非自杀性自伤（NSSI）思想——在没有任何 NSSI 行为的情况下——是否与青少年的自杀思想和行为有关，然后再检查 NSSI 行为的特征是否与更严重的自杀思想和行为有关。
从中学招募的青少年（n=2057，M 年龄=15.56 岁）报告了他们的终生 NSSI 史、自杀思想和行为、NSSI 特征和 NSSI 功能。接收者操作特征分析测试 NSSI 状态和 NSSI 行为特征是否对临床显著自杀思想和行为具有诊断性（修订后的自杀行为问卷得分 7 或更高）。回归模型测试 NSSI 功能是否预测更高的自杀倾向。
有 NSSI 思想和有 NSSI 行为的青少年比没有 NSSI 史的青少年更有可能报告有过终生自杀意念和过去一年的自杀计划。此外，有 NSSI 史的青少年比没有 NSSI 史的青少年更有可能报告有过终生自杀企图和过去一年的自杀企图。更多的 NSSI 方法、NSSI 伤害需要医疗援助，以及出于自我惩罚、抗自杀和寻求刺激的功能进行 NSSI，与更严重的自杀思想和行为有关。
数据是横断面的，限制了对因果关系的推断。
研究结果强调了 NSSI 思想和 NSSI 行为特征在理解 NSSI 与青少年自杀思想和行为之间复杂关系中的重要性。
