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arXiv 1604.04656stat.ME
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验证偏差下ROC曲面的非参数估计

Nonparametric Estimation of ROC Surfaces Under Verification Bias

Khanh To Duc, Monica Chiogna, Gianfranco Adimari

摘要:

验证偏差是一个众所周知的问题时,诊断测试的预测能力进行评估。在本文中,我们讨论了如何评估的准确性,连续规模的诊断测试中存在的验证偏差,当被认为是三级疾病状态。特别是,我们提出了一个完全非参数验证偏差校正估计的ROC表面。我们的方法是基于最近邻插补,并采用通用的平滑回归模型的疾病和验证过程。证明了估计量的相合性和渐近正态性,并通过几个蒙特卡罗模拟研究了其有限样本行为。方差估计进行了讨论,并给出了一个说明性的例子。

英文摘要:

Verification bias is a well known problem when the predictive ability of a diagnostic test has to be evaluated. In this paper, we discuss how to assess the accuracy of continuous-scale diagnostic tests in the presence of verification bias, when a three-class disease status is considered. In particular, we propose a fully nonparametric verification bias-corrected estimator of the ROC surface. Our approach is based on nearest-neighbor imputation and adopts generic smooth regression models for both the disease and the verification processes. Consistency and asymptotic normality of the proposed estimator are proved and its finite sample behavior is investigated by means of several Monte Carlo simulation studies. Variance estimation is also discussed and an illustrative example is presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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