Purpose. The aim of this study was to investigate musculoskeletal disorders (MSDs) and associated factors among Iranian office personnel. Materials and methods. In this cross-sectional study, 359 Iranian office workers were included. Data were gathered using a demographic questionnaire, the Nordic musculoskeletal questionnaire, the numeric rating scale, rapid office strain assessment (ROSA) and the NASA task load index (NASA-TLX). Results. Our findings showed that the highest prevalence rate of MSDs within the last 12 months and the highest pain/discomfort severity were related to the participants' necks. The mean performance, mental demand and effort subscale scores of the NASA-TLX were higher than other subscales (physical demand, temporal demand and frustration level). ROSA scores showed that 53.8% of the participants were in action level 1 (low MSD risk) and the rest (46.2%) were in action level 2 (high MSD risk). The pain/discomfort severity in the shoulders, elbows, wrists/hands, thighs and ankles/feet was correlated to the final ROSA score. Age, gender, body mass index and some NASA-TLX subscales (effort, mental demand and performance) were associated with symptoms of MSDs in different body regions. Conclusions. Improving workplace conditions (both mentally and physically) is suggested for reducing and eliminating musculoskeletal problems among office workers.
Keywords: NASA task load index; musculoskeletal disorders; office workers; pain; rapid office strain assessment.