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The dominant side of the body was assessed using this method. RULA examines the number of movements, static muscle work, and force as risk factors. At first, body limbs are divided into two groups: group A which includes the upper arm, lower arm, and wrist and group B which includes the neck, trunk, and legs. The range of movement for each body part is divided into different sections and each section is numbered based on its deviation from the normal Selleck EPZ-6438 posture. Accordingly, score 1 is given to the range of movement or sitting working posture where the risk factors present are minimal, and higher scores are allocated to parts of the movement range with more extreme postures indicating an increasing presence of risk factors. If the body part is deviated from the midline or rotated, the number attributed to the posture increases. Afterwards, the scores of different body parts are combined, and given the muscular activity and the exerted force, a final score is derived which indicates the level of risk of injury (Tables ?(Tables22 and ?and3).3). The ergonomic posture of subjects during sitting work is examined for 20 minutes, movements of different body parts are observed and recorded, and the worst and most frequent postures are assessed. Table 2 RULA scores in groups of body limbs. Table 3 Final scores and action levels. In addition, Nordic Musculoskeletal Questionnaire (NMQ), developed by Kourinka et al. (1987), was used to examine the incidence and prevalence of musculoskeletal disorders among the subjects during the past 12 months [26]. The questionnaire is used as a tool for screening musculoskeletal Akt inhibitor disorders in epidemiological studies [14], but it cannot be used for clinical diagnosis. The questionnaire consists of two parts: (A) general questionnaire to answer the question of whether problems of musculoskeletal exist and if so where the focus is in the organs of the human body taking this issue into nine anatomical sites (neck, shoulders, back, Montelukast Sodium elbows, back, wrist/hand, hip/thigh, knee, and ankle/foot) or groups and to investigate the area and its history of pain in the last 12 months or inability to leave work and the impact of these problems on the person doing deals and (B) specific questionnaire to provide a deeper analysis of these symptoms in certain areas of the body such as back, neck, and shoulders and career history and its impact on individual deals. Individual and job characteristics and RULA scores of dentists were reported by mean, standard deviation, and frequency; for determining relation between RULA scores and symptoms of pain in the same limb, data were analyzed using logistic regression analysis; for determining relation between symptoms of pain and variables, chi-squared test was used; to compare two groups, women and men, we used t-test. All tests were performed at the P