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A comparison of methods for the assessment of postural load and duration of computer use.

机译：评估姿势负荷和计算机使用时间的方法的比较。

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AIM: To compare two different methods for assessment of postural load and duration of computer use in office workers. METHODS: The study population existed of 87 computer workers. Questionnaire data about exposure were compared with exposures measured by a standardised or objective method. Measuring true exposure to postural load consisted of an observation of the workstation design and posture by a trained observer. A software program was used to record individual computer use. RESULTS: Comparing the answers for each item of postural load, six of eleven items showed low agreement (kappa <0.20). For six items the sensitivity was below 50%, while for eight items the specificity was 80% or higher. Computer workers were unable to identify risk factors in their workplace and work posture. On average, computer workers overestimated their total computer use by 1.6 hours. The agreement among employees who reported a maximum of three hours of computer use per day was higher than the agreement among employees with a high duration of computer use. CONCLUSIONS: Self-report by means of this questionnaire is not a very reliable method to measure postural load and duration of computer use. This study emphasises that the challenge to develop quick and inexpensive techniques for assessing exposure to postural load and duration of computer use is still open.
机译：目的：比较两种评估办公室工作人员姿势负荷和计算机使用时间的方法。方法：研究人群为87名计算机工作者。将有关暴露的问卷数据与通过标准化或客观方法测得的暴露进行比较。测量实际承受的姿势负荷包括由训练有素的观察员观察工作站的设计和姿势。使用软件程序记录个人计算机的使用情况。结果：比较每项姿势负荷的答案，11项中有6项显示出较低的一致性（kappa <0.20）。对于六个项目，敏感性低于50％，而对于八个项目，特异性为80％或更高。电脑工作者无法识别其工作场所和工作姿势中的危险因素。平均而言，计算机工作者高估了1.6个小时的计算机使用总量。每天最多报告三个小时使用计算机的员工之间的协议高于持续使用计算机的员工之间的协议。结论：通过本问卷进行自我报告并不是衡量姿势负荷和计算机使用时间的可靠方法。这项研究强调，开发快速和廉价的技术来评估姿势负荷和计算机使用时间的挑战仍然是挑战。

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