Article(id=1325530057590194494, tenantId=1146029695717560320, journalId=1256213402557890569, issueId=1325529948685091532, articleNumber=null, orderNo=null, doi=10.16835/j.cnki.1000-9817.2025242, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736092800000, receivedDateStr=2025-01-06, revisedDate=1743350400000, revisedDateStr=2025-03-31, acceptedDate=null, acceptedDateStr=null, onlineDate=1793960592886, onlineDateStr=2026-11-06, pubDate=1756051200000, pubDateStr=2025-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793960592886, onlineIssueDateStr=2026-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793960592886, creator=13701087609, updateTime=1793960592886, updator=13701087609, issue=Issue{id=1325529948685091532, tenantId=1146029695717560320, journalId=1256213402557890569, year='2025', volume='46', issue='8', pageStart='1065', pageEnd='1216', issueExtLink='null', onlineDate='null', pubDate='1756051200000', pubDateStr='2025-08-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793960566921, creator='13701087609', updateTime=1793960566921, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=1175, endPage=1179, ext={EN=ArticleExt(id=1325530057841852735, articleId=1325530057590194494, tenantId=1146029695717560320, journalId=1256213402557890569, language=EN, title=Predicting model for the impact of Internet usage characteristics on suicidal ideation among vocational high school students, columnId=1259565855189418448, journalTitle=Chinese Journal of School Health, columnName=Mental Health, runingTitle=null, highlight=null, articleAbstract=
Objective

To explore the association between the Internet usage characteristics and suicidal ideation among vocational high school students, so as to provide a theoretical basis for precise intervention of suicide among vocational high school students.

Methods

A total of 1 781 students were recruited from three vocational high schools in Wuhan and Xianning in March 2023 by using the cluster random sampling method. The Columbia-Suicide Severity Rating Scale and Revised Chen Internet Addiction Scale were used to measure suicidal ideation and Internet addiction, respectively. LASSO regression model was used to select influential factors related to suicidal ideation, and the gradient boosting decision tree algorithm XGBoost was used to develop prediction models and evaluate predictive performance. By calculating the SHAP values, the contribution of each influential factor was quantified.

Results

The prevalence of suicidal ideation among vocational high school students was 42.22% and prevalence of Internet addiction was 26.39%. LASSO regression results indicated that age, gender, experience of being left behind, parental relationship, holding a class cadre position, using the Internet for learning, Internet use during dawn, morning and late night, Internet addiction, and depressive symptoms were all the influential factors of suicidal ideation among vocational high school students (β=-0.05, 0.29, 0.09, 0.27, 0.10, -0.01, 0.09, 0.05, 0.24, 0.28, 0.78, all P < 0.05). The AUC of the prediction model was 0.75. The results based on SHAP values indicated that all influential factors identified through multivariate analysis contributed positively to the model predictions (SHAP>0). Among these, depressive symptoms and parental relationship had the greatest impact on suicidal ideation (SHAP=0.77, 0.26), and the joint effect of features with higher contribution could improve the prediction probability.

Conclusions

Depressive symptoms, parental relationships, Internet addiction, and time of Internet use are most important risk factors of suicidal behaviors for vocational high school students. Thus, effective interventions should be conducted to reduce their suicidal ideation.

, authors=Bin YU1, Jingyan YAN1, Liqun ZHANG1, Chenchang XIAO2, Fang LI*, 3, Yan GUO4, Hong YAN1, authorsList=Bin YU, Jingyan YAN, Liqun ZHANG, Chenchang XIAO, Fang LI, Yan GUO, Hong YAN, authorCompany=null, correspAuthors=Fang LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2025 Chinese Journal of School Health. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1325530060610093381, articleId=1325530057590194494, tenantId=1146029695717560320, journalId=1256213402557890569, language=CN, title=网络使用特征对职业高中学生自杀意念影响的预测模型, columnId=1259565858817491410, journalTitle=中国学校卫生, columnName=心理卫生, runingTitle=null, highlight=null, articleAbstract=
目的

探究职业高中学生(简称职高生)网络使用特征与自杀意念的关联,为职高生自杀群体精准干预提供参考依据。

方法

2023年3月,采用整群随机抽样方法从武汉市、咸宁市3所职业高中抽取1 781名学生为研究对象,采用哥伦比亚-自杀严重程度评价量表、网络成瘾量表分别评估自杀意念和网络成瘾状况。采用LASSO回归模型筛选自杀意念的影响因素,采用梯度增强决策树算法XGBoost构建自杀意念预测模型,评估预测效能,通过计算SHAP值解释每个影响因素的贡献程度。

结果

职高生的自杀意念报告率为42.22%,网络成瘾报告率为26.39%。LASSO回归结果显示,年龄、性别、留守经历、父母关系、担任班干部、上网内容为学习、上网时间段(黎明、清晨、深夜)、网络成瘾、抑郁症状均是职高生自杀意念的影响因素(β值分别为-0.05,0.29,0.09,0.27,0.10,-0.01,0.09,0.05,0.24,0.28,0.78,P值均<0.05),预测模型的AUC值为0.75。基于SHAP的可视化结果表明,所有通过多变量分析确定的影响因素对模型预测均有正向贡献(SHAP值均>0),其中抑郁症状、父母关系对自杀意念的影响最大(SHAP值分别为0.77,0.26),贡献度较大的特征值之间共同作用可以提高预测概率。

结论

抑郁症状、父母关系、网络成瘾和上网时间段均是职高生自杀意念的重要风险因素,应进行有效干预降低职高生自杀风险。

, authors=俞斌1, 严婧琰1, 张立群1, 肖琛嫦2, 李芳*, 3, 郭燕4, 燕虹1, authorsList=俞斌, 严婧琰, 张立群, 肖琛嫦, 李芳, 郭燕, 燕虹, authorCompany=null, correspAuthors=李芳, authorNote=

俞斌(1988-),男,浙江杭州人,博士,副教授,主要研究方向为行为流行病学(青少年健康与行为)、精神卫生流行病学及流行病方法学(心理健康与药物滥用、非线性统计分析)

, correspAuthorsNote=
李芳,E-mail:
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俞斌(1988-),男,浙江杭州人,博士,副教授,主要研究方向为行为流行病学(青少年健康与行为)、精神卫生流行病学及流行病方法学(心理健康与药物滥用、非线性统计分析)

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俞斌(1988-),男,浙江杭州人,博士,副教授,主要研究方向为行为流行病学(青少年健康与行为)、精神卫生流行病学及流行病方法学(心理健康与药物滥用、非线性统计分析)

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J Psychiatr Res, 2014, 58: 7-11., articleTitle=null, refAbstract=null)], funds=[Fund(id=1325530067501334917, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, awardId=null, language=CN, fundingSource=国家自然科学基金委员会-青年科学基金项目(#82204073);教育部人文社科基金项目(#22YJC840037);武汉市卫生健康委员会-预防医学专项项目(#WY22B09), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1325530061218267462, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, xref=1, ext=[AuthorCompanyExt(id=1325530061226656071, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, companyId=1325530061218267462, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1School of Public Health, Wuhan University, Wuhan 430071, Hubei Province, China), AuthorCompanyExt(id=1325530061239238984, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, companyId=1325530061218267462, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1武汉大学公共卫生学院,湖北 430071)]), AuthorCompany(id=1325530061310542153, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, xref=2, ext=[AuthorCompanyExt(id=1325530061318930762, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, companyId=1325530061310542153, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2武汉城市学院医学部)]), AuthorCompany(id=1325530061595754827, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, xref=3, ext=[AuthorCompanyExt(id=1325530061608337740, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, companyId=1325530061595754827, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3武汉市疾病预防控制中心卫生应急部)]), AuthorCompany(id=1325530061675446605, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, xref=4, ext=[AuthorCompanyExt(id=1325530061683835214, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, companyId=1325530061675446605, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4武汉市疾病预防控制中心卫生应急部)])], figs=[ArticleFig(id=1325530066545033599, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, language=EN, label=Fig.1, caption=SHAP value analysis of suicidal ideation among vocational high school students, figureFileSmall=oFb5Woqx+r8moppryJhbKg==, figureFileBig=ET+s5bQjUBEEp4isXexFrg==, tableContent=null), ArticleFig(id=1325530066654085504, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, language=CN, label=图1, caption=职高生自杀意念SHAP值分析

注:A模型基于SHAP的特征重要性分析,B为SHAP特征摘要分析。

, figureFileSmall=oFb5Woqx+r8moppryJhbKg==, figureFileBig=ET+s5bQjUBEEp4isXexFrg==, tableContent=null), ArticleFig(id=1325530067039961473, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, language=EN, label=Fig.2, caption=Partial feature dependency of depression symptoms, parental relationship and late-night Internet usage among vocational high school students, figureFileSmall=6Mja5S8oU+taDdoTBcz+8g==, figureFileBig=i60r5XhMo0MVtggzcWS0jA==, tableContent=null), ArticleFig(id=1325530067111264642, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, language=CN, label=图2, caption=职高生抑郁症状与父母关系和深夜上网的部分特征依赖分析

注:父母关系1~5分别指很融洽、比较融洽、一般、较紧张、很紧张,抑郁症状0~2分别指无、可能有、肯定有。

, figureFileSmall=6Mja5S8oU+taDdoTBcz+8g==, figureFileBig=i60r5XhMo0MVtggzcWS0jA==, tableContent=null), ArticleFig(id=1325530067190956419, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, language=EN, label=Tab.1, caption=

Comparison of detection rate of suicidal ideation among different groups of vocational high school students

, figureFileSmall=null, figureFileBig=null, tableContent=
组别选项人数自杀意念报告人数χ2值P值组别选项人数自杀意念报告人数χ2值P值
性别男995359(36.08)34.31< 0.01每天平均上网时长/h< 3604226(37.42)17.40< 0.01
女786393(50.00)3~ < 4406168(41.38)
留守经历否1 296499(38.50)26.45< 0.014~ < 6415176(42.41)
是485253(52.16)≥6356182(51.12)
父母关系很融洽578167(28.89)114.94< 0.01上网学习否564271(48.05)11.14< 0.01
比较融洽599240(40.07)是1 217481(39.52)
一般381194(50.92)上网社交聊天否11943(36.13)1.680.20
较紧张162112(69.14)是1 662709(42.66)
很紧张6139(63.93)上网看视频否17464(36.78)2.100.15
教育方式放任自由13774(54.01)56.72< 0.01是1 607688(42.81)
比较民主1 440548(38.06)上网听音乐否345133(38.55)2.180.14
比较强制204130(63.73)是1 436619(43.11)
是否重点班否1 483623(82.85)0.120.73上网浏览各种APP(知乎、小红书、贴吧、微博等)否1 021421(41.23)0.870.35
是298129(17.15)是760331(43.55)
是否担任班干部否1 336540(40.42)6.840.01上网看小说否1137475(41.78)0.210.65
是445212(47.64)是644277(43.01)
成绩班级排名前10%12955(7.31)10.690.06上网干其他事情否1 626687(42.25)0.011.00
前20%22895(12.63)是15565(41.94)
前30%21894(12.50)拂晓(00:00—02:59)上网否825289(35.03)32.05< 0.01
前40%16858(7.71)是956463(48.43)
前50%434169(22.47)黎明(03:00—05:59)上网否1 322500(37.82)40.05< 0.01
50%以后604281(37.37)是459252(54.90)
抑郁症状无896205(22.88)321.99< 0.01清晨(06:00—08:59)上网否586202(34.47)21.05< 0.01
可能有243106(43.62)是1 195550(46.03)
肯定有642441(68.69)上午(09:00—11:59)上网否484192(39.67)1.640.20
首次使用网络方式手机1 262513(40.65)2.450.08是1 297560(43.18)
电脑385174(45.19)中午(12:00—14:59)上网否1441(29.08)10.27< 0.01
平板12663(50.00)是1 640711(43.35)
其他82(25.00)下午(15:00—17:59)上网否292106(36.30)4.740.03
首次使用网络地点家里1 618686(42.40)0.55*是1 489646(43.38)
网吧4114(34.15)傍晚(18:00—20:59)上网否16252(32.10)7.040.01
学校3014(46.67)是1 619700(43.38)
亲朋好友8634(39.53)深夜(21:00—23:59)上网否33589(26.57)40.67< 0.01
其他64(66.67)是1 446663(45.85)
上网打游戏否348133(38.22)2.640.10网络成瘾否1 311470(35.85)81.72< 0.01
是1 433619(43.20)是470282(60.00)
), ArticleFig(id=1325530067279036804, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530057590194494, language=CN, label=表1, caption=

不同组别职高生自杀意念报告率比较

, figureFileSmall=null, figureFileBig=null, tableContent=
组别选项人数自杀意念报告人数χ2值P值组别选项人数自杀意念报告人数χ2值P值
性别男995359(36.08)34.31< 0.01每天平均上网时长/h< 3604226(37.42)17.40< 0.01
女786393(50.00)3~ < 4406168(41.38)
留守经历否1 296499(38.50)26.45< 0.014~ < 6415176(42.41)
是485253(52.16)≥6356182(51.12)
父母关系很融洽578167(28.89)114.94< 0.01上网学习否564271(48.05)11.14< 0.01
比较融洽599240(40.07)是1 217481(39.52)
一般381194(50.92)上网社交聊天否11943(36.13)1.680.20
较紧张162112(69.14)是1 662709(42.66)
很紧张6139(63.93)上网看视频否17464(36.78)2.100.15
教育方式放任自由13774(54.01)56.72< 0.01是1 607688(42.81)
比较民主1 440548(38.06)上网听音乐否345133(38.55)2.180.14
比较强制204130(63.73)是1 436619(43.11)
是否重点班否1 483623(82.85)0.120.73上网浏览各种APP(知乎、小红书、贴吧、微博等)否1 021421(41.23)0.870.35
是298129(17.15)是760331(43.55)
是否担任班干部否1 336540(40.42)6.840.01上网看小说否1137475(41.78)0.210.65
是445212(47.64)是644277(43.01)
成绩班级排名前10%12955(7.31)10.690.06上网干其他事情否1 626687(42.25)0.011.00
前20%22895(12.63)是15565(41.94)
前30%21894(12.50)拂晓(00:00—02:59)上网否825289(35.03)32.05< 0.01
前40%16858(7.71)是956463(48.43)
前50%434169(22.47)黎明(03:00—05:59)上网否1 322500(37.82)40.05< 0.01
50%以后604281(37.37)是459252(54.90)
抑郁症状无896205(22.88)321.99< 0.01清晨(06:00—08:59)上网否586202(34.47)21.05< 0.01
可能有243106(43.62)是1 195550(46.03)
肯定有642441(68.69)上午(09:00—11:59)上网否484192(39.67)1.640.20
首次使用网络方式手机1 262513(40.65)2.450.08是1 297560(43.18)
电脑385174(45.19)中午(12:00—14:59)上网否1441(29.08)10.27< 0.01
平板12663(50.00)是1 640711(43.35)
其他82(25.00)下午(15:00—17:59)上网否292106(36.30)4.740.03
首次使用网络地点家里1 618686(42.40)0.55*是1 489646(43.38)
网吧4114(34.15)傍晚(18:00—20:59)上网否16252(32.10)7.040.01
学校3014(46.67)是1 619700(43.38)
亲朋好友8634(39.53)深夜(21:00—23:59)上网否33589(26.57)40.67< 0.01
其他64(66.67)是1 446663(45.85)
上网打游戏否348133(38.22)2.640.10网络成瘾否1 311470(35.85)81.72< 0.01
是1 433619(43.20)是470282(60.00)
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网络使用特征对职业高中学生自杀意念影响的预测模型
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俞斌 1 , 严婧琰 1 , 张立群 1 , 肖琛嫦 2 , 李芳 *, 3 , 郭燕 4 , 燕虹 1
中国学校卫生 | 心理卫生 2025,46(8): 1175-1179
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中国学校卫生 |心理卫生 2025 , 46 (8) : 1175 -1179
网络使用特征对职业高中学生自杀意念影响的预测模型
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俞斌(1988-),男,浙江杭州人,博士,副教授,主要研究方向为行为流行病学(青少年健康与行为)、精神卫生流行病学及流行病方法学(心理健康与药物滥用、非线性统计分析)

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俞斌(1988-),男,浙江杭州人,博士,副教授,主要研究方向为行为流行病学(青少年健康与行为)、精神卫生流行病学及流行病方法学(心理健康与药物滥用、非线性统计分析)

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俞斌1, 严婧琰1, 张立群1, 肖琛嫦2, 李芳*, 3 , 郭燕4, 燕虹1
作者信息
  • 1武汉大学公共卫生学院,湖北 430071
  • 2武汉城市学院医学部
  • 3武汉市疾病预防控制中心卫生应急部
  • 4武汉市疾病预防控制中心卫生应急部
通讯作者:
李芳,E-mail:
作者简介:

俞斌(1988-),男,浙江杭州人,博士,副教授,主要研究方向为行为流行病学(青少年健康与行为)、精神卫生流行病学及流行病方法学(心理健康与药物滥用、非线性统计分析)

Predicting model for the impact of Internet usage characteristics on suicidal ideation among vocational high school students
Bin YU1, Jingyan YAN1, Liqun ZHANG1, Chenchang XIAO2, Fang LI*, 3 , Yan GUO4, Hong YAN1
Affiliations
  • 1School of Public Health, Wuhan University, Wuhan 430071, Hubei Province, China
出版时间: 2025-08-25 doi: 10.16835/j.cnki.1000-9817.2025242
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目的

探究职业高中学生(简称职高生)网络使用特征与自杀意念的关联,为职高生自杀群体精准干预提供参考依据。

方法

2023年3月,采用整群随机抽样方法从武汉市、咸宁市3所职业高中抽取1 781名学生为研究对象,采用哥伦比亚-自杀严重程度评价量表、网络成瘾量表分别评估自杀意念和网络成瘾状况。采用LASSO回归模型筛选自杀意念的影响因素,采用梯度增强决策树算法XGBoost构建自杀意念预测模型,评估预测效能,通过计算SHAP值解释每个影响因素的贡献程度。

结果

职高生的自杀意念报告率为42.22%,网络成瘾报告率为26.39%。LASSO回归结果显示,年龄、性别、留守经历、父母关系、担任班干部、上网内容为学习、上网时间段(黎明、清晨、深夜)、网络成瘾、抑郁症状均是职高生自杀意念的影响因素(β值分别为-0.05,0.29,0.09,0.27,0.10,-0.01,0.09,0.05,0.24,0.28,0.78,P值均<0.05),预测模型的AUC值为0.75。基于SHAP的可视化结果表明,所有通过多变量分析确定的影响因素对模型预测均有正向贡献(SHAP值均>0),其中抑郁症状、父母关系对自杀意念的影响最大(SHAP值分别为0.77,0.26),贡献度较大的特征值之间共同作用可以提高预测概率。

结论

抑郁症状、父母关系、网络成瘾和上网时间段均是职高生自杀意念的重要风险因素,应进行有效干预降低职高生自杀风险。

因特网  /  自杀  /  精神卫生  /  回归分析  /  学生
Objective

To explore the association between the Internet usage characteristics and suicidal ideation among vocational high school students, so as to provide a theoretical basis for precise intervention of suicide among vocational high school students.

Methods

A total of 1 781 students were recruited from three vocational high schools in Wuhan and Xianning in March 2023 by using the cluster random sampling method. The Columbia-Suicide Severity Rating Scale and Revised Chen Internet Addiction Scale were used to measure suicidal ideation and Internet addiction, respectively. LASSO regression model was used to select influential factors related to suicidal ideation, and the gradient boosting decision tree algorithm XGBoost was used to develop prediction models and evaluate predictive performance. By calculating the SHAP values, the contribution of each influential factor was quantified.

Results

The prevalence of suicidal ideation among vocational high school students was 42.22% and prevalence of Internet addiction was 26.39%. LASSO regression results indicated that age, gender, experience of being left behind, parental relationship, holding a class cadre position, using the Internet for learning, Internet use during dawn, morning and late night, Internet addiction, and depressive symptoms were all the influential factors of suicidal ideation among vocational high school students (β=-0.05, 0.29, 0.09, 0.27, 0.10, -0.01, 0.09, 0.05, 0.24, 0.28, 0.78, all P < 0.05). The AUC of the prediction model was 0.75. The results based on SHAP values indicated that all influential factors identified through multivariate analysis contributed positively to the model predictions (SHAP>0). Among these, depressive symptoms and parental relationship had the greatest impact on suicidal ideation (SHAP=0.77, 0.26), and the joint effect of features with higher contribution could improve the prediction probability.

Conclusions

Depressive symptoms, parental relationships, Internet addiction, and time of Internet use are most important risk factors of suicidal behaviors for vocational high school students. Thus, effective interventions should be conducted to reduce their suicidal ideation.

Internet  /  Suicide  /  Mental health  /  Regression analysis  /  Students
俞斌, 严婧琰, 张立群, 肖琛嫦, 李芳, 郭燕, 燕虹. 网络使用特征对职业高中学生自杀意念影响的预测模型. 中国学校卫生, 2025 , 46 (8) : 1175 -1179 . DOI: 10.16835/j.cnki.1000-9817.2025242
Bin YU, Jingyan YAN, Liqun ZHANG, Chenchang XIAO, Fang LI, Yan GUO, Hong YAN. Predicting model for the impact of Internet usage characteristics on suicidal ideation among vocational high school students[J]. Chinese Journal of School Health, 2025 , 46 (8) : 1175 -1179 . DOI: 10.16835/j.cnki.1000-9817.2025242
自杀行为是指个体故意采取可能会导致自身死亡、存在自杀意图的极端行为[1]。近年来,青少年自杀在人群中的发生率逐年上升,已成为15~19岁青少年的第四大死因[2]。2022年中国卫生健康统计年鉴显示,我国15~19岁青少年自杀死亡率为3.45/10万,连续5年呈现快速上升趋势[3]。自杀行为主要包括自杀意念和自杀尝试,被认为是自杀重要的前置因素[4]。研究发现,网络使用与自杀行为高度相关[5],且使用时间与自杀存在正向关联[6]。但目前多数网络使用与自杀相关的研究集中在问题性网络使用、网络成瘾等方面[7-8]。本研究拟系统探究网络使用特征对职业高中学生(简称职高生)自杀意念的影响,并构建预测模型,为开展有效的职高生自杀预防和干预提供参考依据。
2023年3月,遵循整群随机抽样原则,从武汉市、咸宁市采用随机数字表法抽取3所职业高中开展调查,纳入标准:(1)在校职高生;(2)过去1年内居住地稳定,随访期间不会从居住地迁移;(3)自愿参与调查且监护人签署知情同意书。排除认知能力受限者(由于智力障碍、学习障碍等健康问题无法理解或完成研究问卷)。共发放问卷1 867份,回收1 831份,问卷回收率为98.1%。剔除存在填写规律作答超过50%、缺失值超过70%、极端值等问题的问卷,并对空缺值少于10%的指标进行随机森林插值,最终得到有效问卷1 781份。其中男生995名,女生786名;有留守经历的学生485名,无留守经历学生1 296名;被试平均年龄为(16.17±0.84)岁。本研究获得武汉大学生命医学伦理委员会审批(批准号:IRB2022006)。
本次调查获得学生及家长知情同意后,由调查员进入教室将问卷发给学生,说明信息保密原则及结果只作为研究使用,请学生根据自己的实际情况认真填写。
使用自行设计的问卷调查研究对象的一般特征和网络使用行为,一般特征包括年龄、性别、户口、留守经历、父母关系、教育方式、重点班、班级成绩排名等;网络使用行为包括首次使用网络年龄、首次使用网络方式、上网内容、上网时间段等。
用于评估参与者的抑郁症状水平。量表共有20个条目,包括参与者近1周内情绪低落、价值感低、注意力差、睡眠问题等抑郁症状的出现频率。采用4级评分,除4,8,9,10题反向评分外,其余题目分别对“ < 1 d”“1~2 d”“3~4 d”“5~7 d”计0~3分。总分≤15分为无抑郁症状,16~19分为可能有抑郁症状,≥20分为肯定有抑郁症状。该量表Cronbach α系数为0.93。
用于评估职高生网络成瘾情况。共有26个条目,包括强迫症状、退瘾症状、耐受症状、人际健康问题和时间管理问题5个维度。每个条目采用Likert自评式4级计分,从“1=极不符合”到“4=极符合”,总得分>64分认为具有网络成瘾。该量表Cronbach α系数为0.97。
采用哥伦比亚-自杀严重程度评价量表(Columbia-Suicide Severity Rating Scale, C-SSRS)[11]评估职高生自杀意念。该量表中自杀意念部分4题中任选一项为“是”则判断为有自杀意念,否则为无自杀意念。该量表Cronbach α系数为0.86。
调查前,对调查员进行统一培训确保调查的标准化;调查时,要求研究对象在上课时间内独立匿名完成问卷;问卷填写时,由专业人员进行现场指导;调查结束后统一回收问卷,对所有问卷进行编码和双录入。
数据分析采用R 4.2.1软件,通过正态分布曲线得出计量资料符合或近似正态分布,采用(x ±s)表示;计数资料以例数(百分率)进行描述性分析。采用χ2检验或Fisher检验比较自杀意念报告率在不同人口学特征、网络使用特征上的差异。采用LASSO回归模型进行多因素分析,根据lambda值不为0来筛选影响因素,并选择lambda.lse作为正则化参数。将数据集按照7∶3拆分为训练集和测试集,对筛选出的影响因素采用梯度增强决策树算法XGBoost构建预测模型,根据受试者工作曲线下面积(area under the curve,AUC)判断模型预测效能。采用网格搜索结合交叉验证的方式优化XGBoost模型的超参数,系统探索XGBoost模型的超参数空间,包括最大深度、学习率、子样本比例、列采样比例、L2正则化参数和L1正则化参数。通过计算不同影响因素在模型中的SHAP值(SHapley Additive exPlanations)解释每个特征对预测模型的贡献,从中识别出贡献度最大的两个特征进行交互分析,同时对非网络相关变量与网络使用特征中的最大贡献特征进行交互分析。检验水准α=0.05。
在1 781名职高生中,49.69%(885名)报告有抑郁症状,752名(42.22%)职高生产生过自杀意念。有无自杀意念职高生的年龄分别为(16.11±0.81)(16.21±0.85)岁,差异有统计学意义(t=-2.51,P=0.01)。不同性别、父母关系、教育方式及是否担任班干部、是否有抑郁症状和留守经历职高生自杀意念报告率差异均有统计学意义(P值均 < 0.05)。见表1。
职高生首次使用网络年龄为(9.91±2.51)岁,70.86%的职高生首次使用网络方式为手机。每天平均上网时长>6 h的职高生占19.99%,上网内容主要是社交聊天和看视频,集中在中午和傍晚上网的学生人数占比最高,26.39%的职高生有网络成瘾。每天平均上网时长、上网内容是否为学习、上网时间段是否在拂晓/黎明/清晨/中午/下午/傍晚/深夜、是否网络成瘾职高生自杀意念报告率差异均有统计学意义(P值均 < 0.05)。见表1。
网络使用特征与自杀意念关系的多因素分析将有无自杀意念作为因变量(0=无,1=有),单因素分析有统计学意义的人口学特征和网络使用特征作为自变量分别纳入LASSO回归模型中,结果显示,当lambda.1se=0.020时,年龄、抑郁症状、性别、留守经历、父母关系、是否担任班干部、上网内容为学习、上网时间段在黎明/清晨/深夜、网络成瘾,均为自杀意念的影响因素(β值分别为-0.05,0.78,0.29,0.09,0.27,0.10,-0.01,0.09,0.05,0.24,0.28,P值均 < 0.05)。
将LASSO回归筛选出的变量作为自变量,有无自杀意念(0=无,1=有)作为因变量,构建XGBoost模型进行预测,AUC值为0.75,提示预测效果良好。
图1A显示,抑郁症状、父母关系、性别和留守经历的SHAP值均较高,对自杀意念的预测影响最大。所有特征的平均SHAP值均为正数,表明所有特征对模型预测都有正面贡献。
SHAP特征摘要图中的每点代表一个样本,不同灰度反映影响因子值的大小(值越大灰度越浅,反之越深)。如图1B所示,对于自杀意念来说,影响最大的特征是抑郁症状,抑郁症状程度越深,SHAP值越大,产生自杀意念的概率就越大;其次是父母关系,父母关系越融洽,SHAP值越小,产生自杀意念的概率就越小;网络成瘾和上网时间段在清晨呈现正向分布,特征值越高,自杀意念越强。
两组特征值对模型预测结果的联合影响分析研究从模型中识别出贡献度最大的2个特征(抑郁症状与父母关系),同时在非网络相关变量中选择最大贡献特征(抑郁症状)与网络使用特征中的最大贡献特征(深夜上网)进行交互分析。当父母关系较融洽时,职高生表现出较低水平的抑郁症状,其SHAP值倾向于负值,此时模型预测自杀意念的概率也相对较低;当父母关系不融洽时,个体表现出更严重的抑郁症状,模型预测自杀意念的概率增加。抑郁症状更严重的个体更可能在深夜上网,其行为模式进一步增加了模型预测自杀意念的可能性。以上因素共同作用提高了预测概率。见图2。
本研究发现,职高生自杀意念报告率为42.22%,高于以往对中学生的研究结果[12-13]。可能与职高生面临更多的职业发展、社会认可的挑战和压力有关。
研究结果表明,年龄、性别、留守经历、父母关系等人口学特征是职高生自杀意念的影响因素。年龄相对较小的职高生更可能产生自杀意念,与Lyons等[14-15]研究一致。可能是因为年龄相对较大的学生身心发展更为成熟,应对挫折和压力的能力更强。女生的自杀意念报告率高于男生,与汪妍等[12]研究一致。可能是因为女生的情绪敏感性更高,面临更高的社会期望和角色压力。有留守经历的职高生自杀意念更强,与Fellmeth等[16]研究一致。因父母外出务工,使得子女突然面临生活环境、情感寄托等巨大改变,进而表现出抑郁等负面情绪,易导致自杀意念出现[17]。父母关系不佳同样影响职高生自杀意念,说明家庭环境对学生的发展和成长至关重要,与Yang等[18]研究一致。担任班干部的学生自杀意念可能性大,与王存同等[19]发现不一致。可能与担任班干部除要面对社会和就业压力之外,还增加了额外的责任和工作量有关。在心理状况中,抑郁症状能够预测自杀意念,与罗逸浩等[20]研究一致。
在网络使用特征中,职高生上网内容为学习、上网时间段在黎明/清晨/深夜、网络成瘾与自杀意念有关。研究还发现,在黎明/清晨/深夜上网增加了青少年自杀风险。黎明属于睡眠时间,此时上网社交互动较少,自我思考和情感倾诉的时间变长,孤独和孤立感加剧。清晨学生精神状态脆弱,睡眠不足或睡眠节律延迟会增加抑郁的风险[21]。郭策等[22]发现,青少年在清晨时唾液皮质醇水平较高、情绪起伏较大,是其自杀意念的触发因素。此外,人在深夜易受到负面情绪影响,产生消极想法。网络成瘾会对青少年的决策、记忆等认知功能造成伤害[23],进而影响学习,产生焦虑、抑郁等负面情绪,导致产生极端的想法。预测模型显示,上述因素中抑郁症状、父母关系对自杀意念影响最大。
本研究中采用的XGBoost是通过梯度提升机制逐步改进模型,能在多种数据集上获得较高的预测精度,有效处理复杂的非线性关系,并通过正则化项防止过拟合,提高模型的泛化能力;支持自定义损失函数和评估指标,可以根据具体需求灵活调整模型配置;结合SHAP值可以提供详细的特征重要性分析,使得模型结果更具有可解释性。研究也存在一定的不足:问卷数据以学生自我报告的形式收集,存在回忆偏倚和报告偏倚;样本均来自于湖北省的学校,研究结果缺少外推性;预测模型未进行外部验证。
  • 国家自然科学基金委员会-青年科学基金项目(#82204073);教育部人文社科基金项目(#22YJC840037);武汉市卫生健康委员会-预防医学专项项目(#WY22B09)
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2025年第46卷第8期
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doi: 10.16835/j.cnki.1000-9817.2025242
  • 接收时间:2025-01-06
  • 首发时间:2026-11-06
  • 出版时间:2025-08-25
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  • 收稿日期:2025-01-06
  • 修回日期:2025-03-31
基金
国家自然科学基金委员会-青年科学基金项目(#82204073);教育部人文社科基金项目(#22YJC840037);武汉市卫生健康委员会-预防医学专项项目(#WY22B09)
作者信息
    1武汉大学公共卫生学院,湖北 430071
    2武汉城市学院医学部
    3武汉市疾病预防控制中心卫生应急部
    4武汉市疾病预防控制中心卫生应急部

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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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