Evaluation of the Use of Non-Ergonomic Pointing Devices in the Administrative Workplace

Abstract

Objective: To evaluate ergonomic conditions associated with the use of conventional pointing devices among administrative personnel at Hospital General Docente Ambato, Ecuador, describing wrist symptoms and postural patterns observed during computer work. Method: An observational, descriptive, cross-sectional, non-experimental study was conducted using a census approach with 55 administrative workers: 15 physicians, 20 engineers, and 20 secretaries. A structured questionnaire was applied to characterize sociodemographic and occupational variables and musculoskeletal complaints, while Rapid Upper Limb Assessment (RULA) was used to assess the arm, forearm, wrist, neck, trunk, and lower limbs. Results: Women represented 65.5% of participants and men 34.5%; ages ranged from 28 to 58 years. Wrist pain during work with a conventional mouse was reported by 69.1%. Relevant postural findings included forearm flexion between 60° and 100° in 78.2%, neck flexion between 10° and 20° in 67.3%, lateral head inclination in 76.4%, supported sitting with a trunk-hip angle above 90° in 83.6%, and adequate leg and foot support in 76.4%. Approximately three quarters of workers required some level of ergonomic adjustment. Conclusion: The evaluated population showed a relevant burden of wrist discomfort and modifiable postural conditions. The cross-sectional design identifies preventive needs but does not demonstrate that a conventional mouse causes tendinopathy or carpal tunnel syndrome.