Principles of design and analyses for the calibration of accelerometry-based activity monitors
Principles of design and analyses for the calibration of accelerometry-based activity monitors
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DOI：
10.1249/01.mss.0000185660.38335.de
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发表时间：
2005-11-01
期刊：
影响因子：
--
通讯作者：
Welk, GJ
中科院分区：
文献类型：
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作者：
Welk, GJ
在加速度测量研究中，“校准”一词的意思是将计数转换为其他已建立的测量单位。在这篇文章中，两种类型的校准研究。单位校准（或仪器间变异性）被描述为可靠性问题，而值校准则被描述为有效性问题。介绍了基于加速度计的验证研究的设计原则，为今后的校准研究提供指导。人群必须在人口统计学和规模方面代表预期人群，监护仪必须代表可用的监护仪人群，方案中的活动必须代表预期人群执行的活动类型。在这类研究中采用适当的分析策略也很重要。一个案例研究采用适当的设计原则，包括演示如何根据所使用的分析类型的结果可能会有所不同。直接比较之间的混合模型回归方法和方法的基础上接收器操作者特征曲线。
The term "calibration" in accelerometry research has come to mean the conversion of counts into other established measurement units. In this article, two types of calibration research are described. Unit calibration (or interinstrument variability) is described as a reliability issue, whereas value calibration is described as more of a validity issue. Principles for design of accelerometry-based validation studies are described to provide a guide for future calibration research. The population must be representative of the intended population in terms of demographics and size, monitors must be representative of the population of monitors that would be available, and activities in the protocol must be representative of the types of activities performed by the intended population. It is also important to employ appropriate analytical strategies in this type of research. A case study employing the appropriate design principles is included to demonstrate how results can vary depending on the type of analyses that are used. Direct comparisons are made between a mixed model regression approach and an approach based on receiver operator characteristic curves.