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Evaluation of flour dust exposure and its impact on respiratory tract health condition of Qazvin's flour factory workers

Dazi, Hajar and Safari Variani, Ali (2017) Evaluation of flour dust exposure and its impact on respiratory tract health condition of Qazvin's flour factory workers. Masters thesis, Qazvin university of Medical Sciences,Qazvin , Iran.

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Abstract

Introduction: Exposure to flour dust, as an allergic organic particle, plays an important role in developing occupational airway diseases and occupational asthma. The present study aimed to evaluate flour dust exposure and its impact on respiratory tract health condition of Qazvin's flour factory workers. Materials and methods: This cross-sectional study was conducted in 2015-2016 in Qazvin Flour mills, Iran, on 30 male flour dust workers and 30 male healthy ¬¬control subjects. Exposure level to flour dust was measured using¬ NIOSH500method.¬The pulmonary function test was performed¬¬ in controls, workers before and after working, by using MIRALAB III spirometer. Workers' demographic information and respiratory complaints were collected using American Thoracic Society Questionnaire. The results were¬ analyzed by independent sample t-test, paired t-test, Multivariate linear regression and Chi-square test. Results: Mean and standard deviation (SD) of total concentration of inhalable flour dust was 23.92±18.69 mg/m3, which exceeded occupational exposure limit. Respiratory symptoms such as sputum and shortness of breath were significantly (P<0.05) higher among exposed workers as compared to unexposed. Moreover, a significant decline in¬¬ percent predicted values FEV1%, FEV1/FVC, PEF%, FEF2575%, FEF25%, FEF50%, FEF75% and MVV¬¬% between workers and their matched controls. Furthermore pulmonary function¬¬ after exposing with flour dust¬¬ showed a significant decrease in ¬¬FVC%, FVE1%, and MVV% indices. Discussion: ¬¬On comparing the pulmonary functions of workers before and after work shift indicated that exposure to flour dust¬¬ exceeded the recommended level according to ACGIH recommendation, acutely affected the lung function of workers¬¬ in Iran and that flour mills workers ¬¬were at a risk of developing occupation related lung function impairment. Therefore, engineering and Administrative controls are required in flour mills to reduce the exposure of workers. Keywords: Flour, Occupational exposure, Spirometry, pulmonary function

Item Type: Thesis (Masters)
Subjects: R Medicine > RN Health > RN1003 Occupational Health
Divisions: University Thesis > Faculty of Health > Professional Health
Depositing User: Health School Students
Date Deposited: 12 Jun 2017 07:38
Last Modified: 12 Jun 2017 07:38
URI: http://eprints.qums.ac.ir/id/eprint/6473

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