A b s t r a c t : B i o p s y c h o s o c i a l F a c t o r s a n d Musculoskeletal Symptoms of the Lower Extremities of Saleswomen in Department Storesin Thailand: Praneet PENSRI, et al. Department of Physical Therapy, Faculty of Allied Health Sciences, Chulalongkorn University, Thailand-Objectives: To identify individual, work-related physical and psychosocial factors associated with the self-reported prevalence of musculoskeletal symptoms in the hip, knee and ankle/foot of saleswomen in department stores in Thailand. Methods: A cross-sectional survey was conducted in which 1,310 saleswomen in 18 department stores received a self-administered q u e s t i o n n a i r e . R e t u r n s w e r e 1 , 2 0 0 ( 9 2 % ) questionnaires, and after screening for exclusion criteria, 1,189 saleswomen were found to be eligible for the study. Results: Having a child, number of working hours per day, frequency of body twisting during work and self-rated perception of light intensity in the workplace were each significantly associated with the prevalence of experiencing hip symptoms. Significant associations were found between age, number of hours per day required to stand or walk and self-rated perception of temperature in the workplace, and the prevalence of experiencing knee symptoms. The number of working hours per day and working days per week as well as frequency of working in static postures and rest breaks during work were each significantly related to the prevalence of experiencing ankle/foot symptoms. Conclusions: Among saleswomen, various individual and work-related physical factors were identified as risks and preventive factors for musculoskeletal symptoms in the lower extremities. Further research should focus on these modifiable factors in order to develop effective strategies for reducing the occurrence of such In Thailand, a large number of salespersons are employed by department stores, of which there are many in large cities, especially in Bangkok. The main responsibility of a salesperson is to service clients by providing information and recommendations about goods, finding items requested by clients and proceeding with the purchase. Their job also involves ensuring that there is no shortage of goods on display and that the display of goods is well organized at any given time. They are often designated to oversee a small and particular shopping area in a department store. Because working as a salesperson in a department store requires no specific skill, most salespersons graduate below the Bachelor degree level. Salespersons usually receive low to moderate incomes, depending on the number of working hours and their sales performance. A significantly greater number of saleswomen work in department stores compared to their male counterparts, and similar statistics have been reported for department stores in other countries 1,2) . Salespersons' work conditions usually receive minimal attention with there being no specific measures or policies for preventing work-related injuries in place in Thailand.A recent su...