The influency of screen height of computer in ocurrence of neck pain / A influencia da altura da tela do computador na ocorrencia da dor cervical

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Considering both national and international researched literature, one can notice several disagreements about the most appropriate height of the computer screen in relation to operator eyes level, being here the target to provide better working conditions to the user. Some authors, associations and organizations suggest that the top of the computer screen should be at the line of the person s eyes, or slightly down.This study proposes a new position of the computer screen so that the curvature of the cervical spines is the most physiological as possible. F Furthermore, it, intends to analyze the influence of the symptoms of the cervical region. The method applied consisted of tree phases:(1) a survey on the symptoms, using a vision analogical scale (1 to10) in which the person mentioned his pain level in three regions of his body where computer disturbed him the most while using it;(2) the measurement to determine the level of the eyes related to the central spot of the screen;(3) the application of the same survey, after 90 days of observation, so to evaluate the effectiveness of the intervention in relation to the pain, as well as its location and intensity. The study was done in the administrative sectors of two enterprises. The intervention group (Company A) with a total of 24 persons (15 women and 9 men) whose age average of 30.2(SD=9.4)received the guidance and ergonomic intervention by changing the level of the computer screen. The control group (Company B) with a total of 20 persons(13 women and 7 men )whose age average of 31.6(SD=9.4)received the guidance of ergonomics for their workstation, without changing the level of the screen. The intervention remained under effect for approximately three months during which the persons did their usual and normal work. At the end of the period both the survey data and the usual analogical scale were recorded by a computer software called SAS (Statistical Analysis System), before and after the intervention. The results showed that there was significant reduction in the average measurement of the pain of the ten analyzed areas ( cervical, shoulder, dorsal,elbow,forearm,back,wrists,hands, fingers, hips and thighs, knees and ankles, feet)being statistically similar for both companies. The cervical region results showed higher average values (no statistical significance) of reduction in the extent of pain in Company A , but with statistically significant differences between men and women(p>0.05).On the other hand, it was observed that there is no association between the pain level and the different ages of the users and the daily use of computer. The results confirm the benefits of ergonomic intervention at computer work, mainly to minimize the muscle and skeletal discomforts in a more comfortable and appropriate environment for the job

ASSUNTO(S)

doenças profissionais ergonomics posture computer terminals computadores terminais de computador ergonomia postura computers occupational disease

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