Sara Ebrahimzadeh Abarghoee - Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Gholam Hossein Halvani - Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Fatemeh Kargar-Shouroki - Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Hamideh Mihanpour - Department of Occupational Health Engineering, Genetic and Environmental Adventures Research Center, Faculty of Paramedicine of Abarkouh, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Farzan Madadizadeh - Center for Healthcare Data Modeling, Departments of Biostatistics and Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

Introduction: Exposure to the low frequency electric and magnetic fields (ELF-EMF) is very common in workers occupied in the combined cycle power plant during work shifts  The present study aimed to measure ELF-EMF flux density among shift and non-shift workers, determine job stress among workers and office workers, and identify major factors associated with job stress in the studied groups. Materials and Methods: In this cross-sectional study, the exposed group was divided into ۷۵ shift workers and ۷۵ non-shift workers. Seventy-five office workers were selected as the reference group. The participants’ exposure to ELF-EMF was measured by the EMF-۸۲۸ device. In addition, Osipow Occupational Stress Questionnaire was used to assess the participants’ stress levels. Results: Maximum levels of ELF-EMF among shift workers, non-shift workers, and office workers were ۲۸.۶۷ μT, ۲۳.۴۳ μT, and ۰.۰۶ μT, respectively.  Although the explosion rate to ELF-EMF was higher in the shift and non-shift workers than the office one's, this rate in both of them were lower than the recommended limit as suggested by the American Conference of Governmental Industrial Hygienists (ACGIH). The highest stress score was related to shift workers exposed to ELF-EMF, in which ۴۲.۷% of them experienced moderate to high levels of job stress. Multivariate linear regression analysis showed a significant association between shift work and exposure to ELF-EMF with increased stress. Conclusion: The findings suggested that exposure to ELF-EMF, even at low intensities, is associated with increased stress. Moreover, Shift work is another risk factor for stress.

Occupational Stress, Electromagnetic Fields, Shift Work Schedule, Power Plants.