Comparative Study of Objective and Subjective Approaches to Classroom Chair Dimensions and Their Role in Musculoskeletal Complications

Abstract

There has been no study to evaluate the incidence of musculoskeletal disorders among students and classroom design using both objective and subjective methods. It was unclear which of these methods was more accurate in predicting musculoskeletal disorders- They have muscles. The aim of this study was to compare two methods (objective and subjective methods) and their relationship with musculoskeletal complications. Methods of work and materials The target population was 480 students in the first to sixth grade of Tabriz. In each district, 4 schools, 2 boys 'schools (1 public school and 1 non-profit school) and 2 girls' schools (1 public school and 1 non-profit school) were selected randomly from each educational level and 4 students were selected randomly. Data collection tools included Nordic Musculoskeletal Complications Questionnaire and table and chair characteristics checklist for subjective evaluation. Results Objective evaluation of the students' anthropometric dimensions of chair height and desk height was observed. In mental evaluation in all dimensions of table and chair the percentage of proportion was much higher than the percentage of non-proportion. Objective evaluation of chair height and desk height was associated with pain in all body parts except wrist (P <0.005). Thus, the two methods, objective and subjective, have no compatibility and can not be used interchangeably in research. Conclusion Teague indicated that the two objective and subjective methods had little or no relation to each other.