Using repeated measures to correct correlated measurement errors through orthogonal decomposition.
Using repeated measures to correct correlated measurement errors through orthogonal decomposition.
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使用重复测量通过正交分解来纠正相关测量误差。
DOI:
10.1080/03610926.2016.1275693
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Matthews,CharlesE
中科院分区:
文献类型:
--
作者:
Yu,Chang;Zhang,Sanguo;Friedenreich,Christine;Matthews,CharlesE
In a physical activity (PA) study, the 7-day PA log viewed as an alloyed gold standard was used to correct the measurement error in the physical activity questionnaire. Due to correlations between the errors in the two measurements, the usual regression calibration (RC) may result in a biased estimate of the calibration factor. We propose a method for removing the correlation through orthogonal decomposition of the errors, and then the usual RC can be applied. Simulation studies show that our method can effectively correct the bias.
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