Growing incidence of nonsuicidal self-injury (NSSI) and a lack of intensive examination of NSSI variability among adolescents justify identification of latent classes based on the endorsement of different NSSI behaviors. Latent class analysis was used to detect the heterogeneity of past month NSSI among 322 high school students (73.2% female). Two interpretable latent classes emerged. The Severe/Multimethod NSSI class (39%) engaged in almost all forms of NSSI with high intensity and motivated mainly for intrapersonal reasons. The results imply that compared to Mild/Moderate NSSI group (61%), the Severe class is at greater risk for poor mental health, which can exacerbate further NSSI acts. In school settings, identifying adolescents who are vulnerable for more severe NSSI can help to interrupt NSSI trajectories to emerging adulthood.

非自杀性自伤 (NSSI) 发生率的增加和青少年 NSSI 变异性缺乏深入检查证明基于对不同 NSSI 行为的认可来识别潜在类别是合理的。潜类分析用于检测 322 名高中生（73.2% 为女性）过去一个月 NSSI 的异质性。出现了两个可解释的潜在类。严重/多方法 NSSI 类（39%）以高强度参与几乎所有形式的 NSSI，主要出于个人原因。结果表明，与轻度/中度 NSSI 组（61%）相比，重度组的心理健康状况不佳的风险更大，这可能会加剧进一步的 NSSI 行为。在学校环境中，识别易受更严重 NSSI 影响的青少年可以帮助中断 NSSI 进入成年期的轨迹。