Influence of 24-Hours Shift Work System on Occupational Stress Among Iranian Firefighters

Introduction: firefighters are exposed to variety of stressors. job related factors and shift-work system are the main stressors among iranian firefighters. it seems necessary to study these related factors. therefore, the present study aimed to find out what dimensions of job stress are associated with 24-hour shift-work schedule of firefighters.materials and methods: after studying the validity and reliability ofpersian version of niosh generic job stress questionnaire, 228firefighters completed it, together with the validated version of thesurvey of shift-worker (sos) questionnaire. the spearman, chi 2,mann-whitney and anova statistical analysis were conducted throughspss 18.results: results showed that some undesirable effects of shiftwork inmore than 60% of firefighters are medium to high. there was asignificant relationship between variables of shiftwork (sleep disorders, the undesirable effects of shiftwork) and the variables of job stress (ambiguity in job future, workload, physical environment, job control,employment opportunities, non-work activities, social support from bosses, spouse, friends, relatives, subjective demands, roleincompatibility, role ambiguity and job satisfaction).conclusion: the present study shows that adverse effects of 24-hourshiftwork and occupational stress largely interact with each other.therefore, it could be concluded that job stress could be moderated orreduced and job satisfaction could concurrently be increased throughfocusing on the roots of occupational stress from the perspective ofshiftwork systems.