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BACKGROUND AND AIM: High prevalence of low back pain is one of the most common problems among nurses. The aim of this study was to evaluate the relation of the intensity of low back discomfort to two low back pain contributor factors (Ergonomics risk factors and psychosocial factors). METHODS: This cross-sectional survey was conducted on 120 emergency unit nurses in Esfahan. Job content, ergonomics hazards and nordic questionnaire were used in that order for daily assessment of Psychosocial and Ergonomics factors and the intensity of low back discomfort. Nurses were questioned during a 5-week period, at the end of each shift work. The final results were analyzed with SPSS software18/PASW by using Spearman, Mann-Whitney and Kolmogorov-Smirnove test. RESULTS: There was a significant relationship between work demand, job content, social support and intensity of low back discomfort (P value <0.05). But, there was not any link between intensity of low back discomfort and job control. Also, there was significant relationship between intensity of low back discomfort and ergonomics risk factors. CONCLUSION: This study showed an indirect relationship between the intensity of low back discomfort and social support. This study also confirmed a direct relationship between the intensity of low back discomfort and work demand, job content, ergonomics factors (Awkward Postures (rotating and bending), manual patient handling and repetitiveness, standing continuously more than 30 min). So, to decrease work related low back discomfort, psychosocial factors should be attended in addition to ergonomics factors.
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