BACKGROUND Few studies have explored the prevalence and unidimensional structure of Non-Suicidal Self-Injury (NSSI) in Spanish adolescents. METHOD In this study, we estimated the prevalence, types, and functions of NSSI in 1,733 Spanish adolescents, and we tested the unidimensional factorial structure of non-suicidal self-injury. RESULTS 24.6% of the adolescents referred to having self-injured at least once during their lifetime, and 12.7% had self-injured using more severe methods of NSSI. The most frequent types of NSSI were interfering with wounds (14.6%), scratching (12.5%), and hitting (11.7%). We found no differences between genders in NSSI frequency. The majority of the participants who self-injured referred to intrapersonal functions. The confirmatory factor analyses of the ISAS-I structure showed a single factor with 10 items, thus supporting the unidimensionality of the construct of NSSI. CONCLUSIONS NSSIs reflect difficulties in regulating emotions or managing interpersonal relationships in young Spanish people, and these behaviours seem to constitute a unique and latent dimension. Thus, there is a need for intervention programmes focused on managing problems of emotional regulation and maladaptive self-injury behaviours.

中文翻译：

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西班牙青少年社区样本中非自杀性自伤的特征和单维性。

背景 很少有研究探讨西班牙青少年非自杀性自伤 (NSSI) 的患病率和单维结构。方法 在这项研究中，我们估计了 1,733 名西班牙青少年 NSSI 的患病率、类型和功能，并测试了非自杀性自伤的单维因子结构。结果 24.6% 的青少年提到在其一生中至少自伤过一次，12.7% 的青少年使用更严重的 NSSI 方法自伤。最常见的 NSSI 类型是干扰伤口 (14.6%)、抓挠 (12.5%) 和击打 (11.7%)。我们发现 NSSI 频率的性别没有差异。大多数自伤参与者提到了内省功能。ISAS-I 结构的验证性因子分析显示一个因子有 10 个项目，从而支持 NSSI 结构的单维性。结论 NSSI 反映了西班牙年轻人在调节情绪或管理人际关系方面的困难，这些行为似乎构成了一个独特的潜在维度。因此，需要专注于管理情绪调节和适应不良的自伤行为问题的干预计划。