Repository of Research and Investigative Information

Repository of Research and Investigative Information

Torbat Heydariyeh University of Medical Sciences

Respiratory Symptoms and Diminished Lung Functions Associated with Occupational Dust Exposure Among Iron Ore Mine Workers in Iran

(2020) Respiratory Symptoms and Diminished Lung Functions Associated with Occupational Dust Exposure Among Iron Ore Mine Workers in Iran. The open respiratory medicine journal. pp. 1-7. ISSN 1874-3064 (Print) 1874-3064 (Linking)

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Background: Dust exposure at quarry mines is inevitable and can result in poor air quality. This research aimed to assess pulmonary symptoms and lung functions of dust-exposed workers at an iron-ore mine in eastern Iran. Methods: An environmental cross-sectional study sampled 174 dust-exposed mine workers and 93 unexposed administrative employees as the reference group. A standardized questionnaire on respiratory symptoms was completed in accordance with recommendations of the American Thoracic Society(ATS). Calibrated spirometer measured Pulmonary Function Tests (PFTs). Data were analyzed via SPSS-21, integrating independent samples t-test, Chi-square and linear or logistic-regression models. Results: There was no significant variation between dust-exposed and reference groups in terms of age, weight, height, work experience and the number of smokers (P>0.05). Mean levels of exposure to inhalable and respirable mineral-dust were 15.09+/-2.34 and 3.45+/-2.57 mg/m(3) respectively. Pulmonary capacities of dust-exposed group were considerably decreased as compared to others (Forced Vital Capacity FVC 86.55+/-13.77 vs. 105.05+/-21.5; Forced Expiratory Volume in 1 second FEV1 88.06+/-16.8 vs. 105.81+/-21.55; FEV1/FVC 103.03+/-18.17 vs. 93.3+/-12.49; and Peak Expiratory Flow PEF 89.82+/-22.58 vs. 98.09+/-20.60) (P<0.001); with a higher prevalence of cough (P=0.041), wheezing (P=0.032), and dyspnea (P=0.035) among formers. Age along with exposure to respirable-dust significantly reduced FVC, FEV1 and FEV1/FVC. Cigarette consumption attenuated FVC and FEV1 on an average of 5 to 9 units. Conclusion: Controlled occupational dust-exposure is a definitive pre-requisite to reduce respiratory problems among quarry workers, with an explicit consideration towards mineral- mine workers. Modifiable accomplices like smoking and non-compliance of PPEs usage should be amicably resolved.

Item Type: Article
Keywords: Respiratory symptoms, Lung Function, Occupational Exposure, Iron-Ore Mine, PFT, FVC, FEV1.
Page Range: pp. 1-7
Journal or Publication Title: The open respiratory medicine journal
Journal Index: Pubmed
Volume: 14
Identification Number: 10.2174/1874306402014010001
ISSN: 1874-3064 (Print) 1874-3064 (Linking)
Depositing User: دکتر محبوبه عبداللهی

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