Effects of workload and job stress on the shift work disorders among nurses: PLS SEM modeling.

Nurses, as the largest forces in the health system, are always challenged with various work responsibilities such as long working hours, lack of manpower and death of patients. This study aimed at providing a model of the relationship between workload and physical and mental health, sleep disorders, and individual and family problems by the mediation role of job stress. The present study is a cross-sectional study that was conducted on 300 nurses in a specialty and sub-specialty hospital in Tehran. For this reason, various questionnaires including demographic, survey of shift workers (SOS) and job stress questionnaires were used to collect the desired data. The proposed model was presented using structural equation modeling method based on Smart-PLS and SPSS-20 software. The results show that workload has an effect on job stress (β=0.747), mental health (β=-0.291), Physical health (β=-0.253), sleep quality (β=-0.234) and personal and family problems (β=-0.206). Also the results of this study show that job stress has an effect on mental health (β=-0.295), Physical health (β=-0.349), sleep quality (β=-0.295) and Personal and family problems (β=-0.441). In conclusion, results showed that the data fitted well with the model and that workload is associated with physical and mental problems, sleep disorders and individual and family problems both directly and indirectly through job stress mediation.