Abstract Posture quantification is important for analyzing trunk and upper extremity loading and estimating the risk of work-related musculoskeletal disorders. This study introduced an inertial measurement unit sensor-based posture-matching (ISPM) method. The ISPM method is the concept that involves observers wearing sensors and simulating postures in photos or videos obtained at job sites to assess the postural risks for the trunk and upper extremity. We tested the inter-rater reliability of the method in 4 novice observers. For the trunk, shoulder/elbow, and wrist joint angle category, weighted kappa scores were 0.89, 0.52, and 0.26, respectively. The results of the ISPM method indicated moderate or high inter-rater reliability for trunk flexion, shoulder flexion/extension, shoulder abduction/adduction, and elbow flexion. The ISPM method was more reliable than conventional observation-based posture assessment tools used for trunk posture analyses. However, the assessment of upper extremity angles indicated that the reliability of ISPM was lower than that of conventional observation-based posture assessment tools. This was a proof-of-concept study conducted using a few samples. Therefore, further testing is necessary to support the findings. Relevance to industry The ISPM method requires a minimal level of training. It uses conventional video recording and imposes almost no interruptions to the workers’ performance. The ISPM method showed moderate inter-rater reliability for the trunk, shoulder flexion/extension, shoulder abduction/adduction, and elbow flexion during the joint angle analysis.

中文翻译：

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基于惯性测量单元传感器的姿态匹配方法的评价者间可靠性：一项试点研究

摘要 姿势量化对于分析躯干和上肢负荷以及估计与工作相关的肌肉骨骼疾病的风险很重要。本研究介绍了一种基于惯性测量单元传感器的姿势匹配 (ISPM) 方法。ISPM 方法是一个概念，涉及观察者佩戴传感器并在工作现场获得的照片或视频中模拟姿势，以评估躯干和上肢的姿势风险。我们在 4 位新手观察者中测试了该方法的评分者间可靠性。对于躯干、肩/肘和腕关节角度类别，加权 kappa 分数分别为 0.89、0.52 和 0.26。ISPM 方法的结果表明躯干屈曲、肩部屈曲/伸展、肩外展/内收和肘关节屈曲具有中等或高度的评分者间可靠性。ISPM 方法比用于躯干姿势分析的传统基于观察的姿势评估工具更可靠。然而，对上肢角度的评估表明，ISPM 的可靠性低于传统的基于观察的姿势评估工具。这是使用几个样本进行的概念验证研究。因此，需要进一步的测试来支持这些发现。与行业的相关性 ISPM 方法需要最低级别的培训。它使用传统的视频录制，几乎不会干扰工人的工作。在关节角度分析过程中，ISPM 方法显示躯干、肩关节屈曲/伸展、肩外展/内收和肘关节屈曲的评分者间可靠性中等。