The findings of this study
showed that more than 50% of investigated jobs are categorized as "hazardous" and there is a
significant difference between SI mean in hazardous and safe jobs (P < 0.0001). In addition, significant
difference was found between prevalence of DUE disorders in "safe" and "hazardous" jobs (P < 0.049).
But, no significant difference (P = 0.3) was obtained between mean absenteeism in "safe" and
hazardous jobs. Also, no significant difference statistically was found between turnover in "safe" and
hazardous jobs (X2 = 0.133, P = 1) and high prevalence of DUE disorders is due to low turnover rate of
workers