Department of Surgery, Section of Orthopaedic Surgery, Rady Faculty of Health Sciences, University of Manitoba, AD4 - 820 Sherbrook St., Winnipeg, MB, R3A 1R9, Canada.
Pan Am Clinic Foundation, 75 Poseidon Bay, Winnipeg, MB, R3M 3E4, Canada.
Med Biol Eng Comput. 2021 Jan;59(1):187-194. doi: 10.1007/s11517-020-02293-8. Epub 2021 Jan 7.
Most studies evaluating the effectiveness of treatments targeting shoulder pathologies use subjective outcome measures such as self-administered questionnaires. To date, there are no validated tools that objectively measure shoulder-specific functional activity. The purpose of this study was to validate wearable accelerometers as an objective proxy for shoulder activity. Ten healthy volunteers wore accelerometers placed at both wrists, the dominant upper arm and the chest while performing standardised shoulder and non-shoulder activities. Recorded tridimensional acceleration was computed into activity counts for epochs of 10 s. Receiver operating characteristics (ROC) curves were built to determine the optimal configuration to classify shoulder-type activities. For single accelerometer placement, the area under the ROC curve (AUC) was optimal for the 10-s epoch (AUC = 0.779) using the wrist placement, with a sensitivity of 94.1% and specificity of 67.5%. The combined upper arm and chest placement had an AUC of 0.985 (94.8% sensitivity, 94.8% specificity). Dual-accelerometer placement (upper arm and chest) is the optimal configuration to classify shoulder activity. However, a sole wrist-based accelerometer can be used as an objective proxy for shoulder activity in long-term unsupervised monitoring with excellent sensitivity and acceptable specificity.
大多数评估针对肩部病变的治疗效果的研究都使用主观的结果测量方法，如自我管理的问卷。迄今为止，还没有用于客观测量肩部特定功能活动的经过验证的工具。本研究的目的是验证可穿戴加速度计作为肩部活动的客观替代指标。10 名健康志愿者在进行标准的肩部和非肩部活动时，在两个手腕、优势上臂和胸部佩戴加速度计。将记录的三维加速度转换为 10 秒的活动计数。构建接收器操作特性 (ROC) 曲线以确定最佳配置以对肩部类型的活动进行分类。对于单个加速度计的位置，使用手腕位置，10 秒时的 ROC 曲线下面积（AUC）最佳（AUC=0.779），灵敏度为 94.1%，特异性为 67.5%。上臂和胸部的联合放置具有 AUC 为 0.985（94.8%的灵敏度，94.8%的特异性）。双加速度计放置（上臂和胸部）是对肩部活动进行分类的最佳配置。然而，仅使用腕部加速度计也可以作为肩部活动的客观替代指标进行长期非监督监测，具有极好的灵敏度和可接受的特异性。
