title: Effects of work-related stress on work ability index among refinery workers.
abstract: BACKGROUND
  Work-related stress is one of the basic problems in industrial also top 10 work-related health problems and it is increasingly implicated in the development a number of problems such as cardiovascular disease, musculoskeletal diseases, early retirement to employees. On the other hand, early retirement to employees from the workplace has increased on the problems of today's industries. Hereof, improving work ability is one of the most effective ways to enhance the ability and preventing disability and early retirement. The aim of This study is determine the relationship between job stress score and work ability index (WAI) at the refinery workers.
  
  
  METHODS
  This is a cross-sectional study in which 171 workers from a refinery in isfahan in 2012 who were working in different occupational groups participated. Based on appropriate assignment sampling, 33 office workers, 69 operational workers, and 69 maintenance workers, respectively, were invited to participate in this study. Two questionnaires including work related-stress and WAI were filled in. Finally, the information was analyzed using the SPSS-20 and statistic tests namely, analysis of covariance Kruskal-Wallis test. Pearson correlation coefficient, ANOVA and t-test.
  
  
  RESULTS
  Data analysis revealed that 86% and 14% of participants had moderate and severe stress respectively. Average score of stress and standard deviation was 158.7 ± 17.3 that was in extreme stress range. Average score and standard deviation of WAI questionnaire were 37.18 and 3.86 respectively. That placed in a good range. Pearson correlation coefficient showed that WAI score had significant reversed relationship with a score of stress.
  
  
  CONCLUSIONS
  According to the results, mean stress score among refinery worker was high and one fator that affect work abiity was high stress, hence training on communication skills and safe working environment in order to decreses stress, enhance the work ability of workers.
authors.affiliation: Department of Occupational Health Engineering, School of Health, Isfahan, Iran.
authors.forename: Ehsanollah
authors.initials: E
authors.lastname: Habibi
authors.affiliation: Department of Occupational Health Engineering, School of Health, Isfahan, Iran.
authors.forename: Habibollah
authors.initials: H
authors.lastname: Dehghan
authors.affiliation: Department of Occupational Health Engineering, School of Health, Isfahan, Iran.
authors.forename: Shahram
authors.initials: S
authors.lastname: Safari
authors.affiliation: Department of Biostatistics and Epidemiology, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Behzad
authors.initials: B
authors.lastname: Mahaki
authors.affiliation: Department of Biostatistics and Epidemiology, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Akbar
authors.initials: A
authors.lastname: Hassanzadeh
keywords: Refinery workers; stress; work ability
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