Genetic variation in EYA4 on the risk of noise-induced hearing loss in Chinese steelworks firm sample.

Objectives: Noise-induced hearing loss is one of the most serious occupational diseases worldwide. It is caused by interactions between environmental and genetic factors. The purpose of this study was to examine the association between the genetic susceptibility of the eye absent homolog 4 (EYA4) gene and the risk of developing noise-induced hearing loss in China.

Using the Job Burden-Capital Model of Occupational Stress to Predict Depression and Well-Being among Electronic Manufacturing Service Employees in China.

Background: This study aimed to identify the association between occupational stress and depression-well-being by proposing a comprehensive and flexible job burden-capital model with its corresponding hypotheses.

Methods: For this research, 1618 valid samples were gathered from the electronic manufacturing service industry in Hunan Province, China; self-rated questionnaires were administered to participants for data collection after obtaining their written consent. The proposed model was fitted and tested through structural equation model analysis.

[Association between grainyhead-like 2 gene polymorphisms and noise-induced hearing loss].

Objective: To investigate association between genetic polymorphism in the grainyhead-like 2 gene (GRHL2) and noise-induced hearing loss (NIHL) in the Chinese population.

Methods: A matched case-control association study was employed, In which, 3 790 workers exposed to continuous and steady-state occupational noise in a steel factory participated. The questionnaires were adopted to collect individual features and audiometry tests performed.

Genetic Variation in POU4F3 and GRHL2 Associated with Noise-Induced Hearing Loss in Chinese Population: A Case-Control Study.

Noise-induced hearing loss (NIHL) is an important occupational disease worldwide resulting from interactions between genetic and environmental factors. The purpose of this study was to examine whether genetic variations in POU4F3 and GRHL2 may influence susceptibility to NIHL in the Chinese population. A matched case-control study was carried out among 293 hearing loss individuals and 293 normal hearing workers drawn from a population of 3790 noise-exposed workers.

[Analysis of relationship between shift-work and occupational stress among workers from different companies].

Objective: To investigate the relationship between work in shifts and occupational stress.

Methods: A total of 5338 employees from 13 companies were investigated by cluster sampling, and occupational stress measuring tools, job content questionnaire, and effort-reward imbalance questionnaire were used to investigate occupational stress factors, stress reaction, and the condition of work in shifts.

Results: The employees who worked in shifts accounted for 46.

[Depressive symptoms and influencing factors in employees from thirteen enterprises].

Objective: To explore depressive symptoms and influencing factors in employees from 13 enterprises.

Methods: A total of 6711 workers from 13 enterprises were investigated by cluster sampling, and data were collected anonymously between November 2008 and June 2009. Job satisfaction, occupational stressors, strains, coping strategy, and social support were measured using occupational stress instruments, job content questionnaire, and effort-reward imbalance questionnaire.

Long-term exposure to diesel engine exhaust affects cytokine expression among occupational population.

Diesel engine exhaust (DEE) is a predominant contributor to urban air pollution. The International Agency for Research on Cancer classified DEE as a group I carcinogen. Inflammatory response is considered to be associated with various health outcomes including carcinogenesis.

[The effect of occupational stress on depression symptoms among 244 policemen in a city].

Objective: To explore the influence of occupational stress related factors on depression symptoms among 244 policemen in a city in China.

Methods: In May 2011, 287 policemen from a city public security bureau were recruited to this survey by cluster sampling method. We deleted questionnaires which include missing variables on demographic characteristics and factors associated with occupational stress questionnaires which include over 3 missing items.

Increased levels of etheno-DNA adducts and genotoxicity biomarkers of long-term exposure to pure diesel engine exhaust.

Etheno-DNA adducts are biomarkers for assessing oxidative stress. In this study, the aim was to detect the level of etheno-DNA adducts and explore the relationship between the etheno-DNA adducts and genotoxicity biomarkers of the diesel engine exhaust (DEE)-exposed workers. We recruited 86 diesel engine testing workers with long-term exposure to DEE and 99 non-DEE-exposed workers.

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

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.

[Serum levels of matrix metalloproteinase 9 and 19 in the patients with pneumoconiosis].

Objective: To measure peripheral serum levels of matrix metalloproteinase 9 (MMP9) and matrix metalloproteinase 19 (MMP19) in patients with pneumoconiosis, and to investigate their feasibility as potential biomarkers for pneumoconiosis.

Methods: Ninety-eight male patients with pneumoconiosis (49 patients in phase I, 36 patients in phase II, and 13 patients in phase III) were enrolled as subjects, which included 41 patients with silicosis and 57 patients with coal workers' pneumoconiosis. Ninety-eight healthy male physical examinees were used as controls.

[Investigation of coping strategy for occupational stress among workers in thirteen enterprises].

Objective: To investigate the influential factors for the coping strategy for occupational stress among workers in thirteen enterprises.

Methods: An anonymous survey was conducted in 6711 workers in 13 enterprises selected by cluster sampling from November 2008 to June 2009. Coping strategy, occupational stressors, stress response, and social support were measured using occupational stress instruments, job content questionnaire, and effort-reward imbalance questionnaire.

Reduced pulmonary function and increased pro-inflammatory cytokines in nanoscale carbon black-exposed workers.

Background: Although major concerns exist regarding the potential consequences of human exposures to nanoscale carbon black (CB) particles, limited human toxicological data is currently available. The purpose of this study was to evaluate if nanoscale CB particles could be responsible, at least partially, for the altered lung function and inflammation observed in CB workers exposed to nanoscale CB particles.

Methods: Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Brunauer-Emmett-Teller were used to characterize CB.

[Survey on job satisfaction and its influencing factors among enterprise workers].

Objective: To explore the influencing factors of job satisfaction among enterprise workers.

Methods: Between November, 2008 and June, 2009, 6 711 workers from 13 enterprises were recruited to this survey by cluster sampling method. Data about job satisfaction, occupational stressors, strains, coping strategy and social support were collected anonymously by using occupational stress instruments, job content questionnaire and effort-reward imbalance questionnaire.