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Risk factors of Low Back Pain among the Chinese Occupational Population:A Case-control Study

Biomedical and Environmental Sciences 2012年第4期25卷 421-429页

作者： LI Jing yun WANG Sheng HE Li Hua WU shan shan YANG Lei yu shan fa LI Li Ping WANG Jian Xin HUANG Yan Di Department of Occupational and Environmental Health School of Public Health Peking University Beo'ing 100191 China School of Public Health Tongji Medical Collage Huazhong University of Science and Technology Wuhan 430030 Hubei China Administration Department Henan Provincial Institute of Occupational Health Zhengzhou 450052 Henan China Injury Prevention Research Center Medical College of Shantou University Shantou 515041 Guangdong China Beijing Centers for Disease Control and Prevention Beo'ing 100020 China Beijing Municipal Institute of Labor Protection Beijing 100054 China

Objective To explore the risk factors of low back pain among the Chinese occupational population in several major industries. Methods A total of 7200 subjects （3600 cases and 3600 controls） were randomly sampled from a cross-sectional study, and they were investigated for individual and occupational factors of low back pain. The potential risk factors were first selected by using chi-square tests. Secondly, collinearity diagnosis proceeded by using the Kendall＇s rank correlation. Finally, binary logistic regression model was used for multi-factor analysis. Results Collinearity diagnosis showed that there was a severe collinearity problem among the potential risk factors of low back pain. Logistic regression model included 20 variables with statistical significance. Bending neck forward or holding neck in a forward posturefor long periods （0R=1.408） was the most important risk factor inducing low back pain in this study, followed by bending heavily with the trunk （0R=1.402）, carrying out identical work almost for the whole day （0R=1.340）. Additionally, suHicient normal break was a protective factor of low back pain. Conclusion Low back pain among the Chinese occupational population was associated with body height, occupation, work organization, physical work, working posture, and others. All these risk factors could be regarded as the indicators of low back pain, and some relevant preventive measures should be taken to reduce low back pain risk.

关键词： Case-control studies Low back pain Occupational health Risk factors

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Co-effect of Demand-control-support Model and Effort-reward Imbalance Model on Depression Risk Estimation in Humans: Findings from Henan Province of China

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Biomedical and Environmental Sciences 2013年第12期26卷 962-971页

作者： yu shan fa NAKATA Akinori GU Gui Zhen SWANSON Naomi G ZHOU Wen Hui HE Li Hua WANG Sheng Henan Provincial Institute of Occupational Health National Institute for Occupational Safety and Health Peking University Health Science Center

Objective To investigate the co-effect of Demand-control-support （DCS） model and Effort-reward Imbalance （ERI） model on the risk estimation of depression in humans in comparison with the effects when they are used respectively. Methods A total of 3 632 males and 1 706 females from 13 factories and companies in Henan province were recruited in this cross-sectional study. Perceived job stress was evaluated with the Job Content Questionnaire and Effort-Reward Imbalance Questionnaire （Chinese version）. Depressive symptoms were assessed by using the Center for Epidemiological Studies Depression Scale （CES-D）. Results DC （demands/job control ratio） and ERI were shown to be independently associated with depressive symptoms. The outcome of low social support and overcommitment were similar. High DC and low social support （SS）, high ERI and high overcommitment, and high DC and high ERI posed greater risks of depressive symptoms than each of them did alone. ERI model and SS model seem to be effective in estimating the risk of depressive symptoms if they are used respectively. Conclusion The DC had better performance when it was used in combination with low SS. The effect on physical demands was better than on psychological demands. The combination of DCS and ERI models could improve the risk estimate of depressive symptoms in humans.

关键词： Depression Work-related stress Demand-control-support Effort- reward imbalance

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Development of Job Burden-capital Model of Occupational Stress： An Exploratory Study

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Biomedical and Environmental Sciences 2016年第9期29卷 678-682页

作者： WANG Chao LI Shuang LI Tao yu shan fa DAI Jun Ming LIU Xiao Man ZHU Xiao Jun National Institute of Occupational Health and Poison Control Chinese Center for Disease Control and Prevention Beijing 200050 China Graduate School of Chinese Center for Disease Control and Prevention Beijing 202206 China Department of Occupational Health Surveillance Prevention and Treatment Center for Occupational Diseases Zhengzhou 450052 Henan China School of public health Fudan University Shanghai 200032 China

This study proposes a new framework as job burden-capital model for comprehensive assessment on occupational stress. 1618 valid samples were recruited from electronic manufacturing service industry in Hunan province by self-rated questionnaires after written consent. Structural equation model analysis was employed to verify the model by the data collected. The final fitting model has satisfactory fitting goodness （CMIN/DF=5.78, AGFI=0.937, NNFI=0.960, IF1=0.968, RMSEA=0.054）. Both of the measurement model and structural model have acceptable path Ioadings. Job burden and capital could either directly affect occupational outcomes or indirectly influence them through equation personality.

关键词： Development of Job Burden-capital Model of Occupational Stress

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关注工作场所社会心理危险因素及其预防控制

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环境与职业医学 2020年第3期37卷 218-224页

作者：余善法河南医学高等专科学校科研外事处河南郑州451191

工作场所社会心理危险因素及其对健康、经济的影响已成为发达工业化国家职业安全和健康领域最具挑战性的问题,且已对我国人群健康、经济产生影响,并有愈加凸显的趋势,这是我们必须要面对的问题,宜尽早制定因应之策。本文介绍了欧美国家... 详细信息

工作场所社会心理危险因素及其对健康、经济的影响已成为发达工业化国家职业安全和健康领域最具挑战性的问题,且已对我国人群健康、经济产生影响,并有愈加凸显的趋势,这是我们必须要面对的问题,宜尽早制定因应之策。本文介绍了欧美国家工作场所社会心理危险因素的定义和范围、健康危害和经济影响、研究方向及其预防控制措施,并给我国今后工作场所社会心理危险因素的科学研究、预防控制工作提出一些建议。

关键词：工作场所社会心理危险因素职业紧张预防控制

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Stability Analysis of Continuous-time Iterative Learning Control Systems with Multiple State Delays

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自动化学报 2010年第5期36卷 696-703页

作者： MENG De-yuan JIA Ying-Min DU Jun-Ping yu fa-shan The Seventh Research Division Beihang University (BUAA) Beijing 100083 P. R. China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 P.R. China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 P. R. China

This paper presents a stability analysis of the iterative learning control(ILC)problem for continuous-time systems with multiple state delays, especially when system parameters are subject to polytopic-type uncertainties. Using the two-dimensional(2-D) analysis approach to ILC, the continuous-discrete Roesser s type linear systems are employed to describe the entire learning dynamics of time-delay systems(TDS)with the development of an expanding operator. Based on such Roesser systems, the 2-D system theory is first used to develop a necessary and suffcient condition for the asymptotic stability of ILC, and then the robust H∞control theory is combined to provide a suffcient condition in terms of linear matrix inequalities(LMIs)for the monotonic convergence of *** is shown that learning gains can be determined by solving LMIs, which ensure the control input error converges monotonically to zero as a function of iteration. Simulation results show that a robust asymptotically stable ILC scheme can become robustly monotonically convergent by adding the P-type learning gains that satisfy a set of LMIs, which can also improve the convergence rate greatly

关键词：连续系统稳定性自动化 TDS

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Iterative Learning Control for a Class of Linear Discrete-time Switched Systems

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自动化学报 2013年第9期39卷 1564-1569页

作者： BU Xu-Hui yu fa-shan HOU Zhong-Sheng WANG Fu-Zhong School of Electrical Engineering and Automation Henan Poly-technic University Jiaozuo 454000 China Advanced ControlSystems Laboratory School of Electronics and Information Engi-neering Beijing Jiaotong University Beijing 100044 China

在这份报纸，反复的学习控制(ILC ) 与任意的切换的信号为线性分离时间的交换系统的一个类被考虑。交换系统重复地在有限时间间隔期间被操作，这被假定，然后第一个顺序 P 类型 ILC 计划能被用来完成完美的追踪在上自始至终间隔。由超... 详细信息

在这份报纸，反复的学习控制(ILC ) 与任意的切换的信号为线性分离时间的交换系统的一个类被考虑。交换系统重复地在有限时间间隔期间被操作，这被假定，然后第一个顺序 P 类型 ILC 计划能被用来完成完美的追踪在上自始至终间隔。由超级向量途径，为在重复领域的如此的 ILC 系统的一个集中条件能被给。理论分析被模拟支持。

关键词：迭代学习控制切换系统离散时间线性时间间隔向量方法收敛条件 C系统

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How Work Organization Affects the Prevalence of WMSDs: A Case-control Study

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Biomedical and Environmental Sciences 2015年第9期28卷 627-633页

作者： LIU Lu CHEN Song Gen TANG Shi Chuan WANG Sheng HE Li Hua GUO Ze Hua LI Jing yun yu shan fa WANG Zhong Xu Department of Occupational and Environmental Health Science Peking University School of Public Health Foshan Institute of Occupational Disease Prevention and Control Beijing Key Laboratory of Occupational Health and Safety Beijing Municipal Institute of Labour Protection Beijing Institute of Occupational Medicine for Chemical Industry Henan Provincial Institute for Occupational Health Department of Occupational Health Protection Institute for Occupational Health and Poison ControlChinese Center of Disease Control and Prevention

Objective In this study, we aimed at exploring the association between work-related musculoskeletal disorders（WMSDs） and work organization based on a case-control study. Methods A total of 1938 workers who claimed to suffer from WMSDs were selected from Beijing, Henan, Hubei, and the Guangdong province. The control group consisted of 2009 workers employed in similar industries without severe disease or musculoskeletal discomforts. We used a modified version of the questionnaire developed by the NMQ and the DMQ to investigate individual and work-related factors. Results A total of 13 variables（P〈0.1） were selected by the chi-square test and finally, 7 variables entered into the equation, with 6 variables reaching statistical significance（P〈0.05）. The odds ratios（OR） of ＇work changing with season＇ and ＇sufficient rest time＇ did not reach 1（0.749 and 0.441, respectively）. In addition, ＇sufficient rest time＇ seemed to be the stronger protective factor according to its higher standardized coefficient. And ＇repetitive work every minute＇, ＇constantly repetitive work＇（every day）, ＇shortage of site personnel＇, and ＇often switching shifts with others＇ seemed to be the risk factors. Conclusion Work organization may have comprehensive effects on the occurrence of WMSDs. This pattern of associations suggests that further investigation into the mechanism of how work organization affects the prevalence of WMSDs is required.

关键词： WMSDs Work organization Case-control study Prevalence Risk factors

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Relationship between occupational stress and salivary sIgA and lysozyme in assembly line workers

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Chinese Medical Journal 2008年第17期121卷 1741-1743页

作者： yu shan-fa JIANG Kai-you ZHOU Wen-hui WANG Sheng Henan Provincial Institute of Occupational Medicine Zhengzhou Henan 450052 China Department of Occupational and Environmental Medicine Peking University Health Center Beijing 100083 China

Anumber of studies have investigated the effects of stress on mental health and cardiovascular diseases and the relationship between stress and various components of the immune system, and they found that chronic stress is associated with suppression of a variety of immune parameters. However, acute stress is often associated with transient increases in immune activationl A few studies have also examined the slgA response to occupational stress. Zeier et al2 measured salivary slgA in air traffic controllers before and immediately after radar working sessions lasting approximately 100 minutes. Counter to the author＇s expectation, slgA was significantly elevated after the stressful work-session. Ng et al3 found slgA correlated inversely with self-reported levels of stress among nurses in Singapore. In the United States and Australia, studies on occupational stress in the nursing profession using salivary IgA as a stress indicator have also been conducted. Both studies indicated that the nurses＇ stress was significantly associated with a decreased salivary IgA secretion rates.4.5 A study has indicated salivary lysozyme as a promising marker of the effects of stress on nonspecific immunity, demonstrating a negative relation between perceived stress, as indicated by a stress score obtained by means of a questionnaire, and actual stress in the form of an undergraduate examination and salivary lysozyme levels.6 Ng et al3 have not found a relationship between salivary lysozyme levels and self-reported levels of stress among nurses in Singapore.

关键词： occupational stress cortisol slg A lysozyme salivary

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职业应激易感性与肿瘤坏死因子-α基因多态性的关系

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中华劳动卫生职业病杂志 2008年第12期26卷 715-717页

作者：邱英余善法郑州大学公共卫生学院 450052 河南省职业病防治研究所

目的研究肿瘤坏死因子-α（TNF-α）基因多态性与职业应激易感性的关系。方法应用职业紧张测量工具对169名流水线作业工人进行职业应激测量，依据职业应激评分将其分为高、低应激组，采用聚合酶链反应-限制性片段长度多态性分析其TNF—... 详细信息

目的研究肿瘤坏死因子-α（TNF-α）基因多态性与职业应激易感性的关系。方法应用职业紧张测量工具对169名流水线作业工人进行职业应激测量，依据职业应激评分将其分为高、低应激组，采用聚合酶链反应-限制性片段长度多态性分析其TNF—α基因多态位点的变化。结果低应激组中TNF-α-308位点G／G基因型34例、G／A基因型4例，而高应激组中G／G基因型117例、G／A基因型10例、A从基因型1例；低应激组中TNF-α-308位点A的分布频率与高应激组差异无统计学意义（校正X^2=0．0001，P〉0．05）。在低应激组中TNF-α-238位点G／G基因型30例、G／A基因型7例、刖A基因型1例，而高应激组中G／G基因型118例、G／A基因型10例，低应激组中TNF—α-238位点等位基因A的分布频率高于高应激组，差异有统计学意义（校正X^2=5．449，P〈0．05）。结论TNF—α-238位点多态性可能与职业应激易感性有关，而TNF-α-308位点多态性可能与职业应激遗传易感性无明显关联。

关键词：应激多态性单核苷酸肿瘤坏死因子

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工作场所化学有害因素职业危害风险评价方法探讨与应用

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中华劳动卫生职业病杂志 2010年第5期28卷 389-391页

作者：朱磊余善法郑州大学公共卫生学院 450052 河南省职业病防治研究所

目的探讨一种职业危害风险评价方法，为更好地控制和管理工作场所的职业危害提供依据。方法综合考虑了危害等级、暴露等级和控制措施等级这3项指标，采用风险记分图得到风险等级。结果风险等级分为5级，分别是极高风险、高风险、中等风... 详细信息

目的探讨一种职业危害风险评价方法，为更好地控制和管理工作场所的职业危害提供依据。方法综合考虑了危害等级、暴露等级和控制措施等级这3项指标，采用风险记分图得到风险等级。结果风险等级分为5级，分别是极高风险、高风险、中等风险、低风险和极低风险。运用此方法对某企业部分工种的有害因素进行评价，结果显示，此风险评价法优于现有的评价方法。结论建立了一种新的风险评价方法，评价结果可以为风险管理提供依据。

关键词：职业危害风险等级风险管理

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