Dust exposure is associated with increased lung function loss among workers in the Norwegian silicon carbide industry

Johnsen, Helle; Bugge, Merete; Føreland, Solveig; Kjuus, Helge; Kongerud, Johny; Søyseth, Vidar

doi:10.1136/oemed-2012-101068

Cited by 18 publications

(16 citation statements)

References 40 publications

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“…Ulvestad et al (2001) revealed significant decrease in FEV 1 and FVC related to years of exposure. Increasing working years was also related to decreasing annual decline in FEV 1 among silicon carbide industry workers (Johnsen et al, 2013).…”

Section: Lung Functionmentioning

confidence: 85%

Respiratory Health of Male Steel Workers in the Eastern Coast of Peninsular Malaysia

Hamzah¹,

Tamrin²,

Ismail³

2015

American Journal of Applied Sciences

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A cross sectional study was carried out to determine the prevalence of respiratory symptoms and associated factors with respiratory health among male steel workers. A total of 424 male workers in the steel production plant were recruited using a stratified random sampling. Subjects were interviewed regarding respiratory symptoms using a British Medical Research Council (BMRC) Questionnaire on respiratory symptoms and were examined their lung function using spirometry. Prevalence of chronic cough, chronic phlegm, chest tightness and shortness of breath were 35.8, 32.8, 23.4 and 22.4%, respectively. Age, duration employment and smoking were among the factors associated with respiratory symptoms (p<0.05). Forced Expiratory in 1 sec (FEV 1 ) and %FEV 1 /FVC of workers were significantly reduced as compared to the healthy population (p<0.05). The effect of cigarette on FEV 1 was shown among the current smokers (β = -0.099, p<0.05). Level of dustiness was significantly reduced the FVC (β = -0.047, p<0.05) while duration of work was significantly reduced the %FEV 1 /FVC (β = -0.214, p<0.01). Lung function test revealed some degree of impairment as compared to healthy population and smoking also had an additive effect on respiratory health, thus required further extensive epidemiological and pathological studies for the health and safety of the steel mill workers.

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Section: Lung Functionmentioning

confidence: 85%

Respiratory Health of Male Steel Workers in the Eastern Coast of Peninsular Malaysia

Hamzah¹,

Tamrin²,

Ismail³

2015

American Journal of Applied Sciences

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“…An official report of the American Thoracic Society documented the relationship between occupational exposures and an increased risk in chronic cough, lower FEV1, and a lower FEV1/FVC ratio [25]. In addition, dust exposure was found to be associated with a routine decline in FEV1 in workers of Norwegian silicon carbide plants each year [26]. Compared with healthy miners, pulmonary function (FVC, FEV1, FEF50, FEF75, and FEF25–75% of predicted values) declined among miners with CWP, suggesting that changes in pulmonary function parameters are associated with the development of CWP among coal mine workers [27].…”

Section: Discussionmentioning

confidence: 99%

Relationship of cumulative dust exposure dose and cumulative abnormal rate of pulmonary function in coal mixture workers

Qin

Cao

Qian

et al. 2016

The Kaohsiung J of Med Scie

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To investigate the dose-response relationship between cumulative dust exposure (CDE) and cumulative abnormal rate of pulmonary function in coal mixture workers. Three hundred and twenty eight coal mixture workers (exposed group) and 169 nondust-exposed workers (control group) were recruited. Basic information data were collected and pulmonary function tests were performed. Pulmonary function was compared between the two groups after comparing smoking behaviors. Pulmonary function indices [forced vital capacity in 1 second after full inspiration (FVC)%, forced expiratory volume (FEV)1%, and FEV1/FVC%] were compared among groups stratified by service length (exposure duration). The relationship between CDE dose and cumulative abnormal rate of pulmonary function in coal mixture workers was analyzed. Abnormal rate of pulmonary function in the exposed group (35.1%) was significantly higher than the control group (10.1%; p < 0.001); FVC%, FEV1%, and FEV1/FVC% in the exposed group decreased significantly compared with the control group (all p < 0.05). Differences in FVC%, FEV1%, and FEV1/FVC% among coal mixture workers stratified by exposure duration in the exposed group were statistically significant (all p < 0.05). The discernible increase in the cumulative abnormal rate was observed, from ≥ 1000 mg/m(3)·years group to ≥ 1700 mg/m(3)·years group. Correlation analysis revealed a positive correlation between the CDE dose and the cumulative abnormal rate of pulmonary function. Higher abnormal pulmonary function rate was found among coal mixture workers, characterized by decreased pulmonary function indices. Our results suggested a positive relationship between CDE dose and cumulative abnormal pulmonary function rate, and a rapid increase in cumulative abnormal rate within a certain range of CDE dose. A lower limit value of 1000 mg/m(3)·years has reference significance.

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“…8,9 These prior publications expressed spirometric volumes per squared height, and treated dust exposure as a continuous covariate. The available data suggest that a restrictive component of the association between pulmonary function and dust exposure should be considered.…”

Section: Discussionmentioning

confidence: 99%

“…We previously found that dust exposure in smelters is associated with an accelerated annual decline in lung function 8,9 and with increased prevalence of airflow limitation, 10 indicating an elevated risk of chronic obstructive pulmonary disease. 11 Moreover, our prior findings indicate that increasing dust exposure is positively associated with the incidence of work-related asthma-like symptoms (WASTH) in the absence of doctor-diagnosed asthma.…”

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confidence: 99%

Increased Decline in Pulmonary Function Among Employees in Norwegian Smelters Reporting Work-Related Asthma-Like Symptoms

Søyseth

Johnsen

Henneberger

et al. 2015

Journal of Occupational &Amp; Environmental Medicine

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Objective To investigate associations between work-related asthma-like symptoms (WASTH) and annual pulmonary function decline among employees of 18 Norwegian smelters. Methods A 5-year longitudinal study in which WASTH was defined as a combination of dyspnea and wheezing that improved on rest days and vacation. Results A total of 12,966 spirometry examinations were performed in 3084 employees. Crude annual decline in forced expiratory volume in 1 second (FEV1) (dFEV1) was 32.9 mL/yr (95% confidence interval, 30.5 to 35.3), and crude annual decline in forced vital capacity (FVC) (dFVC) was 40.9 mL/yr (37.8 to 43.9). After adjustment for relevant covariates, employees reporting WASTH showed higher dFEV1 by 16.0 m:/yr (3.4 to 28.6) and higher dFVC by 20.5 mL/yr (6.0 to 35.0) compared with employees not reporting WASTH. Conclusion Work-related asthma-like symptom was associated with greater annual declines in FEV1 and FVC, indicating a restrictive pattern.

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Dust exposure is associated with increased lung function loss among workers in the Norwegian silicon carbide industry

Abstract: Dust exposure, expressed by a quantitative JEM, was found to be associated with an increased yearly decline in FEV1 in employees of Norwegian SiC plants.

Cited by 18 publications

References 40 publications

Respiratory Health of Male Steel Workers in the Eastern Coast of Peninsular Malaysia

Respiratory Health of Male Steel Workers in the Eastern Coast of Peninsular Malaysia

Relationship of cumulative dust exposure dose and cumulative abnormal rate of pulmonary function in coal mixture workers

Increased Decline in Pulmonary Function Among Employees in Norwegian Smelters Reporting Work-Related Asthma-Like Symptoms

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