职业学校学生抑郁和反刍思维在负性生活事件与自我伤害行为间的链式中介作用

The chain mediating effect of depression and rumination between negative life events and non-suicidal self-injury among vocational school students

目的探讨负性生活事件与职业学校学生自我伤害行为间的关系,以及抑郁和反刍思维的链式中介作用。方法采用青少年自我伤害行为量表对贵州某职业学校的1000名学生进行问卷筛选性调查,共筛查出具有自我伤害行为的333名学生。再采用负性生活事件量表、流调中心抑郁量表、反刍思维量表对具有自我伤害行为的学生进行横断面调查。采用SPSS 25.0、Mplus 8.1进行数据分析,并用偏差校正百分位Bootstrap法检验中介效应。结果(1)负性生活事件、抑郁、反刍思维和青少年自我伤害行为得分分别为67.00(54.00,79.00)分、47.00(39.00,53.50)分、64.00(54.00,76.00)分和7.00(2.00,10.00)分;(2)负性生活事件与抑郁(r=0.29,P<0.01)、反刍思维(r=0.40,P<0.01)和自我伤害行为(r=0.18,P<0.01)均呈正相关;(3)抑郁在负性生活事件和自我伤害行为间的中介效应值为0.07,占总间接效应38.89%;反刍思维在负性生活事件和自我伤害行为间的中介效应值为0.06,占总间接效应33.33%;抑郁和反刍思维在负性生活事件和自我伤害行为间的链式中介效应值为0.05,占总间接效应27.78%。结论负性生活事件既可以通过抑郁、反刍思维间接作用于学生的自我伤害行为,也可以通过抑郁—反刍思维链式中介间接作用。

Objective To explore the chain mediating effect of depression and rumination between negative life events and non-suicidal self-injury(NSSI).Methods Adolescents self-harm scale was used to investigate 1000 students in a vocational school of Guizhou Province.A total of 333 vocational students with NSSI were screened through,and further investigated by adolescent self-rating life events check list(ASLEC),the center for epidemiological studies depression scale(CES-D),and ruminative Response Scale(RRS).SPSS 25.0 and Mplus 8.1 software were used for data analysis,and the bias corrected percentile Bootstrap method was used to test the mediating effect.Results(1)The scores for negative life events,depression,rumination and NSSI were 67.00(54.00,79.00),47.00(39.00,53.50),64.00(54.00,76.00)and 7.00(2.00,10.00)respectively.(2)Negative life events were positively correlated with depression(r=0.29,P<0.01),rumination(r=0.40,P<0.01),and NSSI(r=0.18,P<0.01).(3)The mediating effect size of depression between negative life events and NSSI was 0.07,accounting for 38.89%of the total indirect effect.The mediating effect size of rumination between negative life events and NSSI was 0.06,accounting for 33.33%of the total indirect effect.The chain mediating effect of depression and rumination between negative life events and NSSI was 0.05,accounting for 27.78%of the total indirect effect.Conclusion Negative life events can indirectly affect NSSI of vocational education students through depression and rumination,as well as the chain mediating path.