Distinguishability and agreement with continuous data
Distinguishability and agreement with continuous data
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DOI：
10.1002/sim.5896
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发表时间：
2014-01-15
影响因子：
2
通讯作者：
Jover, Lluis
中科院分区：
文献类型：
--
作者：
Carrasco, Josep L.;Caceres, Alejandro;Jover, Lluis
重复测量之间的一致性分析在统计文献中受到了极大的关注，导致了一系列不同的方法。然而，由于所有的方法都能够评估同一主题的阅读之间的接近程度，因此无论采用哪种方法，关于一致性程度的结论都应该是相似的。在这里，两个指标来评估连续重复测量，组内相关系数和总偏差指数之间的一致性，并在两个案例中进行比较。第一个例子涉及的可重复性的个人养分分配策略评估稳定同位素分析。第二个例子涉及显示空间相关性的功能性磁共振成像数据的一致性的评估。结果不同，取决于所采用的方法，导致矛盾的结论一致性的程度。这些结果背后的原因进行了讨论，得出的结论是，总偏差指数只是评估重复测量之间的协议，而组内相关系数评估的概念，涉及重复测量之间的协议和传播的主题之间的可重复性。因此，选择正确方法的最佳途径是理解研究假设背后的正确问题。版权所有（c）2013约翰威利父子有限公司
The analysis of concordance among repeated measures has received a huge amount of attention in the statistical literature leading to a range of different approaches. However, because all the approaches are able to assess the closeness among the readings taken on the same subject, the conclusions about the degree of concordance should be similar regardless the approach applied. Here, two indices to assess the concordance among continuous repeated measures, the intraclass correlation coefficient and the total deviation index, are applied and compared in two case examples. The first example concerns the repeatability of individual nutrient allocation strategy assessed by stable isotope analysis. The second example dealt with the assessment of the concordance of functional magnetic resonance imaging data that shows spatial correlation. The results differ depending upon the approach applied leading to contradictory conclusions about the degree of concordance. The reason behind these results is discussed reaching the conclusion that the total deviation index is just assessing agreement among repeated measurements, whereas the intraclass correlation coefficient assesses the concept of distinguishability among subjects that involves agreement among repeated measurements and spread of subjects at once. Therefore, the best way to select the right approach is to understand the right question behind the research hypothesis. Copyright (c) 2013 John Wiley & Sons, Ltd.