Accuracy and cut-off point selection in three-class classification problems using a generalization of the Youden index.
Accuracy and cut-off point selection in three-class classification problems using a generalization of the Youden index.
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DOI:
10.1002/sim.4044
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发表时间:
2010-12-10
影响因子:
2
通讯作者:
Yiannoutsos, Constantin T.
中科院分区:
文献类型:
--
作者:
Nakas, Christos T.;Alonzo, Todd A.;Yiannoutsos, Constantin T.
关键词:
We study properties of the index J3, defined as the accuracy, or the maximum correct classification, for a given three-class classification problem. Specifically, using J3 one can assess the discrimination between the three distributions and obtain an optimal pair of cut-off points c1 < c2 in the sense that the sum of the correct classification proportions will be maximized. It also serves as the generalization of the Youden index in three-class problems. Parametric and non-parametric approaches for estimation and testing are considered and methods are applied to data from an MRS study on HIV patients.
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