The individuality, work-related physical factors, and health behavior sections were developed based on literature review. Health-related quality of life was adapted from a 12-item short-form health survey (SF-12) Thai version [10]. The prevalences of MSDs during the last 12 months were collected by Standardized Nordic questionnaires [11]. Also, the prevalence of foot pain during the past month was assessed by the Thai version of Manchester foot pain and disability index [12].