中学生抑郁情绪与非自杀性自伤的关系:冲动性的中介作用

Relationship between depressive mood and non-suicidal self-injury in middle school students:the mediating role of impulsivity

背景非自杀性自伤(NSSI)行为是危害中学生心身健康的重要因素,中学生NSSI行为相关危险因素的内在机制尚不清楚。目的探索中学生抑郁情绪、冲动性和NSSI行为之间的关系及内在机制,为预防和干预中学生NSSI行为提供参考。方法于2021年3月,采用整群随机抽样法纳入1161名中学生为研究对象。中学生均接受青少年NSSI行为评定问卷(ANSAQ)、流调中心抑郁量表(CES-D)和Barratt冲动量表(BIS-II)评定。采用Spearman相关分析考查中学生抑郁情绪、冲动性与NSSI行为的相关性,采用Process中介效应检验分析冲动性在中学生抑郁情绪与NSSI之间的中介作用。结果检出存在NSSI行为的共122人(10.51%)。CES-D与BIS-II总评分及各维度评分均呈正相关(r=0.340~0.556,P均<0.01),与ANSAQ总评分及各维度评分均呈正相关(r=0.437~0.540,P均<0.01),BIS-II总评分及各维度评分与ANSAQ总评分及各维度评分均呈正相关(r=0.157~0.437,P均<0.01)。冲动性在抑郁情绪与NSSI行为之间起部分中介作用[间接效应=0.035(95%CI:0.004~0.067,P<0.01),间接效应占总效应的5.81%]。结论中学生的抑郁情绪可以直接影响其NSSI行为,也可以通过冲动性间接影响NSSI行为,冲动性在抑郁情绪和NSSI行为之间起部分中介作用。

Background Non-suicidal self-injury(NSSI)behavior poses a significant risk to the psychosomatic health of middle school students.However,the intrinsic mechanisms underlying the risk factors associated with NSSI behavior remain unclear.Objective To explore the relationship and underlying mechanism between depressive mood,impulsivity,and NSSI behavior in middle school students,and provide valuable insights for the prevention and intervention of NSSI behavior in this population.Methods In March 2021,1161 middle school students were recruited by cluster random sampling.They were assessed using Adolescent Non-Suicidal Self-Injury Assessment Questionnaire(ANSAQ),Center for Epidemiologic Studies Depression Scale(CES-D),and Barratt Impulsivity Scale(BIS-II).Spearman's correlation analysis was used to examine the correlation between depressive mood,impulsivity and NSSI behavior in middle school students.Moreover,the Process mediation effect analysis was adopted to test the mediating role of impulsivity between depressive mood and NSSI behavior.Results Total of 122 people(10.51%)with NSSI behavior were detected.CES-D score was positively correlated with the total score of BIS-II and scores of all dimensions(r=0.340~0.556,P<0.01),and also were positively correlated with the total score of ANSAQ and scores of all dimensions(r=0.437~0.540,P<0.01).Additionally,the total score and dimension scores of BIS-II were positively correlated with the total score and dimension scores of ANSAQ(r=0.157~0.437,P<0.01).Impulsivity played a partial mediating role between depressive mood and NSSI behavior[indirect effect=0.035(95%CI:0.004~0.067,P<0.01),indirect effect accounted for 5.81% of the total effect]. Conclusion Depressive mood in middle school students has both a direct and indirect influence on NSSI behavior, partially mediated by impulsivity. Consequently, impulsivity plays a partial mediating role between depressive mood and NSSI behavior.