Prévalence et déterminants des troubles musculosquelettiques des membres supérieurs chez les artisans tunisiens.

Musculoskeletal disorders (MSDs) of the upper limbs are a major occupational health problem. We report the results of a cross-sectional survey of 334 craftsmen from the governorate of Monastir in Tunisia. The objectives of this study were to assess the prevalence of MSDs among these workers and determine their risk factors. A pre-established questionnaire based on the Nordic MSD questionnaires, Karassik and the one developed by Malchaire in 2000 was used. In the 12 months prior to the survey, the prevalence of MSDs was 92.0%. The risk factors identified were related to individual characteristics, psychosocial factors and work organization. Appropriate preventive measures seem necessary in this sector.

[Semi-quantitative ergonomic analysis of the biomechanical constraints within the cervical spine among screen-operators in the Tunisian universities]. / Analyse ergonomique semi-quantitative des contraintes biomécaniques du rachis cervical parmi les opérateurs sur écran dans les établissements universitaires tunisiens.

INTRODUCTION: This study aims to evaluate the biomechanical constraints associated with neck pain among screen-operators. METHODS: We conducted an ergonomic study of 325 screen-operators in 25 Tunisian universities based on an anthropometric evaluation of on-screen work and on a semi-quantitative analysis of video recordings of the activities of employees over a representative period of 30 minutes. RESULTS: The prevalence of neck pain was 72.3% in a working population who had to seat in an unsuitable chair and to use an unsuitable worktop (84.6%) and a screen too low with regard to horizontal gaze (81.2%). A semi-quantitative analysis, using video recording of the workstation, concluded that the nape flexed more than 40 degrees for 69% of overall working time. Lateral flexion was observed for 50.3% of working time and right or left rotation for 57.4% of working time. Thus, the most limiting head posture on a postural and gestural level was observed when screen-operators read on a computer screen, had an incorrect positioning of the keyboard and consulted documents. CONCLUSION: Our results highlight the importance of biomechanical constraints associated with a design of on-screen work which is not in accordance with the ergonomically recommended anthropometric dimensions. These constraints are associated with a high prevalence of neck pain, reflecting the need to ensure an ergonomic design of workstations in order to prevent this problems.