Factors associated with self-reported musculoskeletal discomfort in video display terminal (VDT) users

Abstract

The purpose of this study was to identify risk factors associated with the self-reported musculoskeletal discomfort in a population of video display terminal (VDT) operators. The data were collected via a survey administered to 373 persons who use a VDT at a corporate office site; 292 of the surveys were returned (78%). Respondents were asked to report on symptoms for six body regions, as well as job requirement information, demographic information, and a question regarding non-occupational hobbies. Six specific body regions were included: head and eyes, neck and upper back, lower back, shoulders, elbows and forearms, and hands and wrists. Descriptive information on these data was obtained through exploratory factor analysis, while logistic regression was used to estimate risk. The results indicated a statistically significant increased risk of discomfort on each of the body regions as the number of hours of keyboard use increases. Improper monitor and keyboard position were also significantly associated with head/eye and shoulder/back discomfort, respectively. These results emphasize the importance of workstation ergonomics and the need to limit the number of uninterrupted hours at the keyboard to reduce musculoskeletal symptoms. Relevance to industry VDTs are ubiquitous in the workplace, even outside the office environment. Understanding risk factors for musculoskeletal discomfort among VDT users will help reduce cost associated with lost time, medical expenses and lost productivity due to improper use of VDTs in the workplace.