Psychology, Temple University, Philadelphia, PA, USA.
University of Southern California, Los Angeles, CA, USA.
Suicide Life Threat Behav. 2018 Feb;48(1):31-37. doi: 10.1111/sltb.12330. Epub 2017 Feb 3.
This study examined how age of nonsuicidal self-injury (NSSI) onset relates to NSSI severity and suicidality using decision tree analyses (nonparametric regression models that recursively partition predictor variables to create groupings). Those with an earlier age of NSSI onset reported greater NSSI frequency, NSSI methods, and NSSI-related hospital visits. No significant splits were found for suicide ideation or attempts, although those with an earlier onset were more likely to have a suicide plan. Overall, findings suggest that onset of NSSI before age 12 is associated with more severe NSSI and may be a crucial age for prevention efforts.
本研究使用决策树分析（一种递归分割预测变量以创建分组的非参数回归模型）探讨了非自杀性自我伤害（NSSI）发病年龄与 NSSI 严重程度和自杀倾向的关系。发病年龄较早的患者报告 NSSI 频率、方法和与 NSSI 相关的住院就诊次数更高。虽然发病年龄较早的患者更有可能制定自杀计划，但在自杀意念或自杀企图方面没有发现显著差异。总体而言，研究结果表明，12 岁之前出现 NSSI 与更严重的 NSSI 有关，可能是预防工作的关键年龄。
