Musculoskeletal disorders in operator drivers in northwestern Namibia ­ associated factors and awareness

Background: Operator drivers are responsible for driving trackless heavy-duty mining or construction vehicles such as graders, dumpers, loaders, and bulldozers. They have an increased prevalence of musculoskeletal disorders (MSDs) due to the nature of their work. There is a paucity of data on MSDs and associated factors among operator drivers in Namibia. Objective: We assessed awareness of, and factors associated with, MSDs among operator drivers in the construction and mining industries in Namibia. Methods: In this cross-sectional study, questionnaires were administered to operator drivers, and managerial staff were interviewed, using a semi-structured interview guide. Data obtained were analysed using chi-square tests and binary logistic regression modelling. Results: 182 operator drivers completed the questionnaires, and 13 operator drivers' supervisors and managers were interviewed. Factors associated with MSDs were length of service for ≥ 10 years (OR 15.3, 95% CI 6.0­39.0), alcohol consumption (OR 2.8, 95% CI 1.1­6.7), lack of physical fitness activity (OR 8.8, 95% CI 3.8­20.4), and lack of awareness of MSDs (OR 3.1, 95% CI 1.3­7.3). Managerial staff were of the opinion that the operator drivers did not suffer from MSDs. Conclusion: We found health issues that are associated with MSDs among the operator drivers, impacting their general wellness and productivity. Monitoring of health and wellness of these workers by the companies is recommended. There is need to increase MSD awareness, personal protective equipment usage, ergonomics skills training, and physical fitness exercises for operator drivers. Employers are urged to adopt policies, and to design guidelines and interventions aimed at promoting occupational health and safety in this population.