respiratory system is the most vulnerable system in the cement industry. is study was conducted to determine the e ects of occupational exposure to cement dust on the respiratory system more thoroughly. Material and Methods: In this cross sectional study an interviewer-administered questionnaire on socio-demographic characteristics and respiratory symptoms was com- pleted and pulmonary function tests were carried out on 100 exposed and 120 non-exposed workers at the cement factory in Mashhad, Iran. e data was statistically analyzed by SPSS 16. Results: e mean of age and work duration in the exposed group was 37.5±6.3 and 10.7±5.4 years compared with the non-exposed group that was 36.1±7.1 and 10.1±5.7 years, respectively. Levels of exposure to inhalable cement dust in the exposed group were 23.13 mg/m3 (higher than national occupational exposure limits for such particles). Among the exposed group, respiratory symptoms as cough (6% vs. 0.8% of the non-exposed) and sputum (7% vs. 0.8% of the non- exposed) were signi cantly more prevalent (p < 0.05). Forced expiratory ow 25–75% (FEF25–75%) was signi cantly lower in the ex- posed workers compared with non-exposed ones (p < 0.05). Also forced expiratory volume in 1 s / forced vital capacity (FEV1/FVC) and FEF25–75% had a reverse correlation with the length of employment (p = 0.000 and p = 0.003, respectively). Conclusions: e nd- ings of this study showed that occupational exposure to cement dust could be a signi cant factor of respiratory system dysfunction. Strict implementation of a respiratory protection program is recommended in cement industries. Med Pr 2015;66(4):471–477
Key words: occupational exposure, respiratory symptoms, pulmonary function test, Portland cement dust, Iran, occupational diseases
respiratory system is the most vulnerable system in the cement industry. is study was conducted to determine the e ects of occupational exposure to cement dust on the respiratory system more thoroughly. Material and Methods: In this cross sectional study an interviewer-administered questionnaire on socio-demographic characteristics and respiratory symptoms was com- pleted and pulmonary function tests were carried out on 100 exposed and 120 non-exposed workers at the cement factory in Mashhad, Iran. e data was statistically analyzed by SPSS 16. Results: e mean of age and work duration in the exposed group was 37.5±6.3 and 10.7±5.4 years compared with the non-exposed group that was 36.1±7.1 and 10.1±5.7 years, respectively. Levels of exposure to inhalable cement dust in the exposed group were 23.13 mg/m3 (higher than national occupational exposure limits for such particles). Among the exposed group, respiratory symptoms as cough (6% vs. 0.8% of the non-exposed) and sputum (7% vs. 0.8% of the non- exposed) were signi cantly more prevalent (p < 0.05). Forced expiratory ow 25–75% (FEF25–75%) was signi cantly lower in the ex- posed workers compared with non-exposed ones (p < 0.05). Also forced expiratory volume in 1 s / forced vital capacity (FEV1/FVC) and FEF25–75% had a reverse correlation with the length of employment (p = 0.000 and p = 0.003, respectively). Conclusions: e nd- ings of this study showed that occupational exposure to cement dust could be a signi cant factor of respiratory system dysfunction. Strict implementation of a respiratory protection program is recommended in cement industries. Med Pr 2015;66(4):471–477Key words: occupational exposure, respiratory symptoms, pulmonary function test, Portland cement dust, Iran, occupational diseases
การแปล กรุณารอสักครู่..
