中职学生不同类型身体活动对闲暇时间久坐行为与非自杀性自伤行为关联的调节作用  

Moderating effects of different types of physical activity on the association between leisure-time sedentary behavior and non-suicidal self-injurious behavior in secondary school students

作　　者：韩杨 王连花 李秋硕 孔维森 李众 冷佩洪 庄礼润 李兵[4] 庹安写 HAN Yang;WANG Lian-hua;LI Qiu-shuo;KONG Wei-sen;LI Zhong;LENG Pei-hong;ZHUANG Li-run;LI Bing;TUO An-xie(School of Public Health,Key Laboratory of Environmental Pollution Monitoring and Disease Control,Ministry of Education,Guizhou Medical University,Guiyang,Guizhou 561113,China;不详)

机构地区：[1]贵州医科大学公共卫生与健康学院,环境污染与疾病监控教育部重点实验室,贵州贵阳561113 [2]贵阳市开阳县疾病预防控制中心应急办公室 [3]贵州医科大学医学人文学院,贵州贵阳561113 [4]贵州大学外国语学院

出　　处：《现代预防医学》2025年第4期654-659,696,共7页Modern Preventive Medicine

基　　金：贵州省2022年省级大学生创新创业项目(S202210660063);贵州省卫健委2023年科学技术基金项目(gzwkj2023-476);贵州省高校人文社会科学研究项目(2023GZGXRW136)。

摘　　要：目的本研究旨在探讨贵州省中职学生的身体活动(PA)在闲暇时间久坐行为(LT-SB)与非自杀性自伤行为(NSSI)关联的调节作用及其临界值,为预防和干预中职学生NSSI提供科学依据。方法于2023年10至12月通过多阶段分层整群随机抽样方法抽取贵州省共9所中职学校学生进行自填式问卷调查,采用多元线性回归分析不同类型PA对中职学生LT-SB与NSSI关联的调节作用,并使用约翰逊-奈曼技术(J-N技术)确定调节效应的临界值。结果贵州省中职学生NSSI检出率为27.5%,其中,男生、女生检出率分别为14.2%和13.3%。多元线性回归显示,总PA、轻度身体活动(LPA)、中度身体活动(MPA)、重度身体活动(VPA)与LT-SB的交互项系数分别为-0.255、-0.220、-0.472、-0.424(P<0.001),其中MPA的调节效应最大;J-N技术显示,随着PA时间的增加,LT-SB与NSSI之间的关联减弱,临界值分别为:总PA 2.39 h,LPA 1.63 h,MPA 0.99 h,VPA 1.11 h。结论在制定预防中职学生NSSI行为的运动干预措施时,大约每天1 h的MPA可能是最为适宜和高效的选择。Objective To investigate the moderating role of physical activity(PA)in the association between leisure-time sedentary behavior(LT-SB)and non-suicidal self-injurious behaviors(NSSI)among secondary vocational students in Guizhou Province,and to determine its significant value for providing a scientific basis for the prevention and intervention of NSSI among this group.Methods Students from a total of nine secondary schools in Guizhou Province were selected for a self-administered questionnaire survey through a multi-stage stratified whole cluster random sampling method from October to December 2023,and multiple linear regression was used to analyse the moderating effect of different types of PA on the association between LT-SB and NSSI among secondary students and to determine the critical value of the moderating effect by using Johnson-Neumann techniques(J-N techniques).Results The detection rate of NSSI among secondary vocational students in Guizhou Province was 27.5%,with male and female students'rates at 14.2%and 13.3%,respectively.Multiple linear regression showed that the interaction term coefficients of total PA,light physical activity(LPA),moderate physical activity(MPA),and vigorous physical activity(VPA)with LT-SB were-0.255,-0.220,-0.472,and-0.424(P<0.001),respectively,with MPA having the largest moderating effect.The J-N technique indicated that the association between LT-SB and NSSI weakened as the duration of PA increased,with critical values of 2.39 hours for total PA,1.63 hours for LPA,0.99 hours for MPA,and 1.11 hours for VPA.Conclusion When developing an exercise intervention to prevent NSSI behavior in secondary vocational students,approximately 1 hour of MPA per day may be the most appropriate and efficient option.

关 键 词：身体活动 闲暇时间久坐行为 非自杀性自伤行为 中职学生 调节作用 

分 类 号：R165[医药卫生—公共卫生与预防医学] R179