The 7-day prevalence of LBP in this study was 68.60% (95% CI: 65 to 72%). It was revealed that the 7-day prevalence of LBP was stratified according to the individual health profile variables (see Table 1) and workrelated characteristics (see Table 2). To determine the simple effects of the demographic variables on the prevalence of LBP, we used contingency tables and Chisquare tests. Results revealed the prevalence of LBP to be significantly higher for the age group 35 years old and older (73.57 vs. 63.46%; p = .0062), in workers with 5 or more years of employment (74.38 vs. 65.06%; p = .0139), and in workers working more than 8 hours per day (71.93 vs. 58.33%; p = .0015) (Table 1).