A multiple logistic regression analysis was performed using a backward stepwise elimination procedure to identify significant work-related characteristics in a model of 7-day prevalence of LBP. Work factors associated with the 7-day prevalence of LBP at the significance level (p value) of .20 were considered candidates in the initial multiple logistic regression. Subsequently, univariate analyses were conducted on each candidate work factor considering specific settings of significant demographic variables (e.g., age less than 35 years).