[The dose-response relationship of chrysotile asbestos exposure and lung cancer in cohort study].

Objective: To clarify the dose-response relationship between asbestos dust exposure and lung cancer incidence in chrysotile asbestos miners by fixed cohort study and to investigate the incidence rates of lung cancer in exposure to different concentrations of asbestos dust.

Methods: A retrospective cohort study was conducted in 1932 asbestos miners who registered from January 1, 1981 to December 31, 1988, had worked for at least 1 year, and had no obvious cardiopulmonary diseases; the cohort study began in July 2009 and covered a time span of 29 years (1981 - 2009). The personal information, occupational history, disease history, and health data of these miners were recorded, and the monitoring data on dust concentrations in the mine over the years were collected.

[Study on mental workload of teachers in primary schools].

Objective: To investigate the distribution characteristics and influencing factors of mental workload of teachers in primary schools.

Methods: National Aeronautics and Space Administration-Task Load Index (NASA-TLX) was used to assess the mental workload levels for 397 teachers of primary schools in a city.

Results: The mental workload (64.

[A survey report on dermatitis patients in hospital in Baoan district of shenzhen city from 1992 to 2006].

Objective: To analyse the epidemiological distribution of dermatitis patients in hospital and provide basis for studying the basic conditions and the prevention of dermatitis especially TCE-induced dermatitis in Baoan District of Shenzhen City.

Methods: All dermatitis patients in hospital in Baoan District from 1992 to 2006 were descriptively analysed.

Results: There were 645 dermatitis patients in hospital in Baoan District.

[Reliability and validity of Comprehensive Work Ability Index scales].

Objective: To test the reliability and the validity of Comprehensive Work Ability Index (CWAI) scales.

Methods: For evaluating the reliability and validity of CWAI scales, 1959 subjects employed in various kinds of occupations were selected with the random cluster sampling method. 245 subjects of them were retested at intervals of 2 to 4 weeks in order to assess the test-retest reliability.

[Development and evaluation of Comprehensive Work Ability Index scales].

Objective: To compile the instrument of comprehensive work ability evaluation-Comprehensive Work Ability Index (CWAI) scales.

Methods: One hundred and ninety-eight employees were selected with the random cluster sampling method from a factory. On the basis of the work ability theory, CWAI scales, a self-rating scales on work ability, was developed according to the standardized processes of scales compilation.

Cancer mortality and asbestosis among workers in an asbestos plant in Chongqing, China.

Objective: To investigate whether asbestosis is a risk factor for mortality of lung cancer.

Methods: A fixed cohort study was established in an asbestos plant in Chongqing, China, and followed up for 30 years from the beginning of 1972. Basic personal information on life state, cause of death, and diagnosis of asbestosis was collected.

[Nested case-control study of chrysotile and lung cancer].

Objective: To investigate the relationship between simple exposure to chrysotile and lung cancer.

Methods: The nested case-control study method was used. All of lung cancer cases collected from a male fixed prospective cohort with follow-up of 30 years served as cases and a 1:4 matched proportion was used to select non-cancer case as controls.

[Development of safety climate measurement at workplace: validity and reliability assessment].

Objective: To develop a measurement of safety climate at workplace and assess its validity and reliability.

Methods: According to the theory of preventive safety culture model, a scale including 7 dimensions of 27 items was developed. 342 workers were selected from among all workers of an artificial board factory and were investigated with the developed scale.

[Paired-control study on the effect of vanadium on neurobehavioral functions].

Objective: To investigate the change of neurobehavioral functions of workers with long term exposure to vanadium.

Methods: A total of 106 workers with exposure to vanadium were paired with workers without exposure to vanadium. The WHO-NCTB was employed to assess the neurobehavioral functions.

[Factors affecting workers' compliance to occupational health and safety management system manuals].

Objective: To identify the factors that affect the implementation of workers' manuals of occupational health and safety management system (OHSMS).

Methods: A self-designed questionnaire, which contained 23 items, was used to investigate workers' knowledge, responsibility and supporting environment of the OHSMS. The Logistic Regression Model was developed to identify factors that affect the implementation of the OHSMS.

[Path analysis on workplace violence affecting work ability, job satisfaction and turnover intent in health professionals in Shangqiu City].

Objective: To explore the effects of workplace violence on work ability, work satisfaction and turnover intent based on the theory of occupational stress in health professionals and to provide evidence for evaluating the process and consequence of workplace violence.

Methods: Subjects of 483 health professionals from 5 hospitals in Shangqiu city of Hennan Province were selected with stratified cluster random sampling method. Workplace violence, violent fear at work, coping resources, work ability, job satisfaction and turnover intent were measured with questionnaires.

[Study on association of interleukin-1 receptor antagonist(RA) gene + 2018 locus mutation with silicosis].

Objective: To approach whether + 2018 locus (T-- C) mutation within the interleukin- receptor antagonist (IL-1RA) gene promoter region are associated with susceptibility to silicosis in Southwest Chinese Han population.

Methods: 75 cases of silicosis and 137 silica-exposed workers(being employed) were selected as subjects.5ml peripheral vein blood was drawn from each subject.

[Study on the relationship between workplace violence and work ability among health care professionals in Shangqiu City].

Objective: To study the relationship between workplace violence and work ability and to provide evidence for preventing workplace violence and improving work ability among health care professionals.

Methods: A test of the workplace violence and work ability was carried out with workplace violence scale and work ability index, and Other information was investigated with questionnaire among 507 health care professionals in Shangqiu City of China.

Results: (1) The mean score of workplace violence was significantly higher in the group aged 30 - 44 than that of the group aged 45 - 59 (P < 0.

[Job burnout and contributing factors for nurses].

Objective: To investigate the degree of job burnout and contributing factors for nurses.

Methods: A total of 495 nurses from three provincial hospitals were randomly selected. The MBI-GS, EPQ-RSC and OSI-R were administered to measure job burnout, personality traits and occupational stress, respectively.

[Study of the intervention measures for the occupational stress to the teachers in the primary and secondary schools].

Objective: To study the status of the occupational stress and the work ability of the teachers in the primary and secondary schools, then take some integrated intervention measures to reduce the occupational stress and improve their work ability, and evaluate the intervening efficacy.

Methods: The levels of stressor and strain was measured with the occupation stress inventory revised edition (OSI-R) and the work ability was measured with the work ability index (WAI) for the teachers in nine primary and secondary schools in Sichuan Province, then health educations about occupational stress were taken to the teachers in the study group, the same test was carried out after one year for the teachers in the nine schools to evaluate the effect of intervention measures.

Results: (1) After intervening, among the six items of occupational role questionnaire, the scores of role overload, role boundary, responsibility and physical environment of the teachers in the study group significantly decreased, compared with the teachers in the control group, the scores of the role overload, role boundary and physical environment were significantly lower (P < 0.

[Analysis on the incidence and relevant risk factors of campus violence among college students].

Objective: To study the incidence and risk factors of campus violence and to provide evidence for preventing campus violence among college students.

Methods: 5300 college students in two universities in a province of China were selected to participate in the study and were interviewed with questionnaires. Logistic regression was used for data analysis.

[Evaluating training programs on occupational health and safety: questionnaire development].

Objective: To develop a questionnaire to evaluate the quality of training programs on occupational health and safety.

Methods: A questionnaire comprising five subscales and 21 items was developed. The reliability and validity of the questionnaire was tested.

[Occupational stress and job burnout in doctors].

Objective: To investigate the status of job burnout in doctors and its relationship with occupational stress.

Methods: A total of 561 doctors from three provincial hospitals were randomly selected. The Maslach Burnout Inventory-General Survey (MBI-GS) was used to identify job burnout.

[The relationship between the concentration of TGF-beta1 in serum and its gene polymorphisms in CWP].

Objective: To study the relationship between the concentration of TGF-beta1, in serum and its gene polymorphisms in CWP.

Methods: 101 cases of coal worker's pneumoconiosis (CWP)were selected. And the peripheral vein blood samples were collected from them.

[On the association of tumor necrosis factor-alpha gene polymorphisms with the susceptibility to silicosis].

Objective: To find out whether -308 and -238 locus (G --> A) mutation within the tumor necrosis factor-alpha gene (TNF-alpha) promoter region are associated with susceptibility to silicosis in the Han population of southwest China.

Methods: Governed by the principles of voluntatiness and cooperation, 75 patients with silicosis and 137 control with silica-exposure but without silicosis were recruited, and additionally, 140 elderly patients with silicosis and 135 healthy elderly (retired) controls were recruited in this case-control study. 5 ml peripheral vein blood was drawn from each subject.

[The appraisal of reliability and validity of subjective workload assessment technique and NASA-task load index].

Objective: To test the reliability and validity of two mental workload assessment scales, i.e. subjective workload assessment technique (SWAT) and NASA task load index (NASA-TLX).

[Oxidative injury and serum cytokines in coal workers with pneumoconiosis].

Objective: To inquire into the implication of oxidative injury and two cytokines TGF-beta1 and FGF in the occurrence and development of coal worker's Pneumoconiosis.

Methods: The methods of nitrate reductase, TBA, and xanthine oxidase were used to detect the levels of serum NO, MDA and SOD respectively in 50 patients suffering from coal worker's Pneumoconiosis and 50 healthy controls, then ELISA was performed to detect the level of TGF-beta1 and FGF in the two groups.

Results: The levels of NO and MDA in serum of patients with coal worker's Pneumoconiosis were higher than those in the controls; the level of SOD was lower in the patients than in the controls; and there were statistically significant differences between the two groups (P<0.

[Study on mental capacity among workers in chemical industry system].

Objective: To study the mental capacity and its influential factors among workers in chemical industry system (CIS).

Methods: One hundred and one workers were selected from CIS by systematic sampling. Then their mental capacity was measured using 4 indices: short-time memory, decode, AYP and mental functional index (MFI).