The association between the level of perceived physical and psychological work demands and perceived musculoskeletal symptoms in different body regions of the sample are presented in Table 3. Since the number of respondents categorized in low perceived physical demands level was small, to perform meaningful statistical analysis, the low and the medium physical demands levels were combined to form a low-medium physical demands level. In total population, the prevalence of symptoms in all body regions except the lower back and the neck were significantly higher in the group who perceived high level physical demands (P < 0.05), indicating the association between high perceived physical demands and the prevalence of musculoskeletal symptoms. Regarding psychological demands, the same result was obtained, showing that in all body regions; except for the neck, the prevalence of musculoskeletal symptoms were significantly higher in the group who perceived high psychological demands (P < 0.05). This indicated association between high perceived psychological demands and the prevalence of musculoskeletal symptoms. Similar results were obtained for female workers. This meant that in most body regions the prevalence of musculoskeletal symptoms were more among the respondents who perceived high physical and psychological work demands as compared to that of the other group. Among male workers, although in some body regions the prevalence of musculoskeletal symptoms was significantly higher among the group who perceived high work demands, but it was not the case for most regions.