EFFECTS OF AN ERGONOMIC INTERVENTION FOR COMPUTER WORK

目前还没有设计良好的对照研究证明其价值。 人体工学干预降低肌肉骨骼风险的最佳实践 计算机操作员中的障碍和损害。因此，建议 人体工程学和工作组织干预的指导方针已经 被质疑具有未经证实的好处。这次随机化的主要目的是 对照试验是为了确定，在12个月的时间里， 最先进的人机工程学干预包在175台计算机上的应用 客户服务操作员，是与风险的改善相关的 四肢/颈部肌肉骨骼疾病，手臂或颈部疼痛-天，手功能， 与175名对照受试者相比，时间损失和工作效率都有所下降。历史 协变量将通过基线问卷进行评估，稳定性为 协变量将通过离职问卷进行验证。这项干预将 包括另一种几何键盘和鼠标、大尺寸环绕前臂 休息、显示器位置调整、视力检查、椅子调整和 训练。控制组将收到一个新的传统几何键盘 和训练。上肢和颈部疼痛严重程度、手功能和 损失时间之后将通过以下方式进行每周问卷调查 网际网路。如果超过预定的疼痛阈值，则体检 将进行检查以确定肌肉骨骼是否 无序是存在的。多元线性回归与Logistic回归 模型将被应用于检验主要影响和控制显著 协变量。这项研究旨在检测肌肉骨骼的减少 疼痛严重程度的一半或中等效果大小(0.5SD)的发生率-周 得分。将估计实施干预的总成本。这个 调查结果和建议将在全州范围内传播， 加州卫生服务部。

No well-designed, controlled studies have demonstrated the value of 'best practice' ergonomic interventions to reduce risk for musculoskeletal disorders and impairment among computer operators. Therefore, proposed guidelines for ergonomic and work organizational interventions have been challenged as having unproven benefit. The primary aim of this randomized controlled trial is to determine whether, over a 12 month period, a state-of-the-art ergonomic intervention package applied to 175 computer based customer service operators, is associated with an improvement in risk of upper extremity/neck musculoskeletal disorder, arm or neck pain-days, hand function, lost-time, and productivity in comparison to 175 controls subjects. Historical co-variates will be assessed with a baseline questionnaire and stability of co-variates will be verified with an exit questionnaire. The intervention will include an alternative geometry keyboard and mouse, large wrap around forearm rest, monitor location adjustment, vision check, chair adjustment, and training. The control group will receive a new conventional geometry keyboard and training. Upper extremity and neck pain severity, hand function and lost-time will be followed with a weekly questionnaire administered via the Internet. If a predetermined pain threshold is exceeded then a physical examination will be performed to determine whether or not a musculoskeletal disorder is present. Multivariate linear regression and logistic regression models will be applied examine main effects and to control for significant co-variates. The study is designed to detect a reduction of musculoskeletal incidence by half or a medium effect size (0.5SD) of the pain severity-week score. The total cost of implementing the intervention will be estimated. The findings and recommendations will be disseminated statewide in cooperation with the California Department of Health Services.