Optimal sampling ratios in comparative diagnostic trials.
Optimal sampling ratios in comparative diagnostic trials.
复制标题
比较诊断试验中的最佳采样率。
DOI:
10.1111/rssc.12043
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Rosenberger,WilliamF
中科院分区:
文献类型:
--
作者:
Dong,Ting;Tang,LianshengLarry;Rosenberger,WilliamF
A subjective sampling ratio between the case and the control groups is not always an efficient choice to maximize the power or to minimize the total required sample size in comparative diagnostic trials. We derive explicit expressions for an optimal sampling ratio based on a common variance structure shared by several existing summary statistics of the receiver operating characteristic curve. We propose a two-stage procedure to estimate adaptively the optimal ratio without pilot data. We investigate the properties of the proposed method through theoretical proofs, extensive simulation studies and a real example in cancer diagnostic studies.