A sequential conditional probability ratio test procedure for comparing diagnostic tests.

A sequential conditional probability ratio test procedure for comparing diagnostic tests.
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DOI:
10.1080/02664763.2010.515678
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发表时间:
2011-08-01
影响因子:
1.5
通讯作者:
Zhou XH
Zhou XH
中科院分区:
数学4区
文献类型:
--
作者:
Tang L;Tan M;Zhou XH

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在本文中,我们推导出序贯条件概率比检验来比较诊断检验,而无需对检验结果进行分布假设。在我们的方法中,检验统计量是受试者工作特征曲线下的非参数加权面积。通过使用新方法,如果试验继续到计划的结束,那么早期停止诊断试验的决定不太可能被逆转。这种方法中反映的保守性在试验过程中具有更保守的停止边界,这对于诊断性试验尤其有吸引力,因为终点不是死亡。此外,我们的方法的最大样本容量不大于固定样本测试具有类似的权力函数。进行模拟研究,以评估所提出的顺序程序的属性。我们举例说明的方法使用数据从胸主动脉成像研究。
In this paper, we derive sequential conditional probability ratio tests to compare diagnostic tests without distributional assumptions on test results. The test statistics in our method are nonparametric weighted areas under the receiver-operating characteristic curves. By using the new method, the decision of stopping the diagnostic trial early is unlikely to be reversed should the trials continue to the planned end. The conservatism reflected in this approach to have more conservative stopping boundaries during the course of the trial is especially appealing for diagnostic trials since the end point is not death. In addition, the maximum sample size of our method is not greater than a fixed sample test with similar power functions. Simulation studies are performed to evaluate the properties of the proposed sequential procedure. We illustrate the method using data from a thoracic aorta imaging study.
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