Department of Psychiatry, Wroclaw Medical University, Katedra i Klinika Psychiatrii UM, Wybrzeże L. Pasteura 10, 50-367, Wrocław, Poland.
Department of Emergency Medicine, Wroclaw Medical University, Wrocław, Poland.
BMC Psychiatry. 2021 Mar 26;21(1):172. doi: 10.1186/s12888-021-03168-4.
Non-suicidal self-injury (NSSI) and aggression have been demonstrated to serve as risk factors of suicidal behaviours (SB). Non-suicidal self-injury disorder (NSSID) and Suicidal Behaviour Disorder (SBD) are among new diagnostic categories for further studies in the DSM-5 classification.
We recruited 196 girls (aged 15.5 ± 1.2 years) diagnosed with conduct disorder (CD). All of them were assessed with respect of non-suicidal self-injury acts, suicidal attempts, psychopathology, self-esteem and general functioning.
Age of NSSI onset was significantly lower compared to age of first suicidal attempt. SBD was present in 50.0% of patients with NSSID and the prevalence of NSSID in individuals with SBD was estimated at 52.2%. A diagnosis of NSSID, with at least 8 days of engagement in self-injuries during the preceding year, significantly predicted the risk of SBD. This effect appeared to be independent of depressive symptomatology.
Our results cannot be generalized over the whole population of individuals diagnosed with CD because of a lack of male patients, as well as individuals with the most severe and mildest forms of CD. Causal inferences cannot be established due to a cross-sectional study design.
The NSSID with at least 8 days of engagement in self-injuries during the preceding year serves as a predictor of SBD independently of the effects of depressive symptoms. Longitudinal studies are required to confirm our findings.
非自杀性自伤（NSSI）和攻击已被证明是自杀行为（SB）的风险因素。非自杀性自伤障碍（NSSID）和自杀行为障碍（SBD）是 DSM-5 分类中进一步研究的新诊断类别之一。
我们招募了 196 名患有品行障碍（CD）的女孩（年龄 15.5±1.2 岁）。所有患者均接受了非自杀性自伤行为、自杀企图、精神病理学、自尊和一般功能的评估。
NSSI 发病年龄明显低于首次自杀尝试年龄。NSSID 患者中有 50.0%存在 SBD，而 SBD 患者中 NSSID 的患病率估计为 52.2%。至少有 8 天在过去一年中从事自伤行为的 NSSID 诊断，显著预测了 SBD 的风险。这种影响似乎独立于抑郁症状。
由于缺乏男性患者以及 CD 最严重和最轻微形式的患者，我们的结果不能推广到所有患有 CD 的人群。由于横断面研究设计，不能建立因果关系。
过去一年中至少有 8 天从事自伤行为的 NSSID 是 SBD 的独立预测因子，不受抑郁症状的影响。需要进行纵向研究来证实我们的发现。
