Accelerometry as an objective measure of upper-extremity activity,Medical & Biological Engineering & Computing

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Accelerometry as an objective measure of upper-extremity activity
Medical & Biological Engineering & Computing ( IF 2.6 ) Pub Date : 2021-01-07 , DOI: 10.1007/s11517-020-02293-8
Samuel Larrivée ₁ , Emma Avery ₁ , Jeff Leiter _{1,

2} , Jason Old _{1,

2}

Affiliation

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.

Graphical abstract

中文翻译：

加速度计作为上肢活动的客观测量

大多数评估针对肩部病变的治疗有效性的研究使用主观结果测量，例如自我管理的问卷。迄今为止，还没有经过验证的工具可以客观地测量肩部特定的功能活动。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代理。十名健康志愿者在进行标准化的肩部和非肩部活动时，在手腕、优势上臂和胸部佩戴加速度计。记录的三维加速度被计算为 10 s 时期的活动计数。建立接收者操作特征 (ROC) 曲线以确定对肩型活动进行分类的最佳配置。对于单个加速度计放置，ROC 曲线下面积 (AUC) 是使用腕部放置的 10 秒时期 (AUC = 0.779) 的最佳值，灵敏度为 94.1%，特异性为 67.5%。上臂和胸部联合放置的 AUC 为 0.985（94.8% 敏感性，94.8% 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，在长期无监督监测中，单一的基于手腕的加速度计可以作为肩部活动的客观代理，具有出色的灵敏度和可接受的特异性。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，在长期无监督监测中，单一的基于手腕的加速度计可以作为肩部活动的客观代理，具有出色的灵敏度和可接受的特异性。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，在长期无监督监测中，单一的基于手腕的加速度计可以作为肩部活动的客观代理，具有出色的灵敏度和可接受的特异性。

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更新日期：2021-01-07

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