title: Evaluation of respiratory system in textile-dyeing workers.
abstract: BACKGROUND
  Despite the presence of many textile and dyeing plants in Iran, we couldn't find similar studies in this country. Forthermore, considering progress in the dyeing process and engineering controls, assessment of respiratory system is important for these workers. The present study was performed to evaluate the respiratory system in dyeing workers.
  
  
  METHODS
  In a cross-sectional study, 101 dyeing workers (all dyeing workers in yazd) and 90 workers without respiratory exposures (control group), were evaluated. A questionnaire was filled for each participant included Venables questionnaire and some other questions about age, work experience, personal or familial history of asthma or atopy, acute and chronic respiratory symptoms; Then spirometry was performed before and after the shift work Results: The frequency of acute and chronic respiratory symptoms was significantly higher among dyeing workers than controls. According to the Venables questionnaire, 11.9% of the dyeing workers suffered from asthma. Means of FVC and FEV1 of pre-shift spirometry were lower than control (p< 0.001). Across-shift spirometry showed significant reduction of FVC (p< 0.001), FEV1 (p< 0.001), FEF25-75% (p= 0.05) and FEF25% (p= 0.007) in dyeing workers compared to the control group.
  
  
  CONCLUSIONS
  Evaluation of dyeing workers' respiratory system in this study showed that despite development in dyeing processes and engineering controls, workers in this job show more prevalent acute and chronic symptoms, and across-shift changes in spirometric parameters were significantly higher in this work group than the control group. Therefore it is necessary to pay attention to the control of respiratory exposures in this job.
authors: 1. Assistant Professor, Department of Occupational Medicine, Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. mojahede@gmail.com.
authors: Mojahede
authors: M
authors: Salmani Nodoushan
authors: 2. Associate Professor, Department of Occupational Medicine, Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. ah.mehrparvar@gmail.com.
authors: Amir Houshang
authors: AH
authors: Mehrparvar
authors: 3. Assistant Professor, Department of Occupational Medicine, Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. loukzadeh@ssu.ac.ir.
authors: Ziba
authors: Z
authors: Loukzadeh
authors: 4. Assistant Professor, Internal medicine Department, Division of Pulmonary and Critical Care Medicine , Shahid Sadoughi University of Medical Sciences, Yazd, Iran. mrahimian2@hotmail.com.
authors: Masoud
authors: M
authors: Rahimian
authors: 5. Occupational Hygiene MSC, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. ma.ghoveh@gmail.com.
authors: Mohamad Ali
authors: MA
authors: Ghove Nodoushan
authors: 6. PhD student of Occupational Hygiene, Shahid Beheshti University of Medical Sciences, Tehran, Iran. jafarinodoushan@gmail.com.
authors: Reza
authors: R
authors: Jafari Nodoushan
keywords: Respiratory symptoms; Spirometry; Textile insustryasthma