In the present study, the study of the changes in the pulmonary function indices such as FVC, FEV 1 , PEF, FEF and FEV 1 /FVC, over the years of work experience showed that these parameters have a decreasing trend and their average values were lower in the sweepers group than in the supervisors and lower in the supervisors than in the office group.
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Longitudinal study of pulmonary function trends and associated risk factors in iron ore miners.
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