Abstract：
Friendships and peer relationships have an important role in the experience of self-harm ideation and behaviour in young people, yet they typically remain overlooked. This systematic review and narrative synthesis explores the extant literature on this topic to identify important relationships between these constructs. We did a keyword search of peer-reviewed empirical articles relating to friendships and peer relationships and self-harm ideation and behaviour in young people (aged 11-25 years). We identified 90 articles with evidence primarily from adolescents aged 11-18 years, including mixed genders and a majority of White individuals. Findings highlight substantive relationships between the key constructs, showing that: characteristics of friends and peers, including their self-harm ideation and behaviour, relate to and predict ego self-harm ideation and behaviour; friends and peers are important sources of support; and evidence on causal mechanisms is scarce but highlights potential peer selection and influence processes. Studies of the friends and peers of young people with self-harm ideation and behaviour highlight that: friends\' attitudes to self-harm and suicide influence their responses to peers with self-harm ideation and behaviour; and friends who are bereaved and friend supporters experience negative outcomes such as symptoms of depression, anxiety, PTSD, and grief, alongside difficult emotions. Despite substantial heterogeneity across samples, study designs, and definition or measurement of the primary constructs, this work presents an initial step in organising a complex literature on a crucially important topic, which can help to inform future research and evidence-based interventions.
摘要：
友谊和同伴关系在年轻人的自我伤害观念和行为体验中具有重要作用，然而，他们通常仍然被忽视。本系统综述和叙事综合探讨了有关该主题的现有文献，以确定这些结构之间的重要关系。我们对与年轻人（11-25岁）的友谊和同伴关系以及自残观念和行为有关的同行评审经验文章进行了关键字搜索。我们确定了90篇文章，主要来自11-18岁的青少年，包括混合性别和大多数白人。调查结果强调了关键结构之间的实质性关系，表明:朋友和同龄人的特点，包括他们自我伤害的想法和行为，与自我自我伤害的想法和行为有关并预测；朋友和同伴是重要的支持来源；关于因果机制的证据很少，但突出了潜在的同伴选择和影响过程。对具有自我伤害观念和行为的年轻人的朋友和同伴的研究强调：朋友对自我伤害和自杀的态度会影响他们对具有自我伤害观念和行为的同伴的反应；失去亲人的朋友和朋友的支持者会出现负面结果，例如抑郁症状，焦虑,创伤后应激障碍,和悲伤，伴随着困难的情绪。尽管样本之间存在很大的异质性，研究设计，以及主要结构的定义或测量，这项工作提出了组织关于一个至关重要的主题的复杂文献的第一步，这可以帮助为未来的研究和循证干预提供信息。
