Πλοήγηση ανά Συγγραφέα "Alonzo, T. A."
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Accuracy and cut-off point selection in three-class classification problems using a generalization of the Youden index
Nakas, C. T.; Alonzo, T. A.; Yiannoutsos, C. T. (2010)We study properties of the index J(3), defined as the accuracy, or the maximum correct classification, for a given three class classification problem Specifically, using J(3) one can assess the discrimination between the ... -
A comparison of tests for restricted orderings in the three-class case
Alonzo, T. A.; Nakas, C. T.; Yiannoutsos, C. T.; Bucher, S. (2009)A variety of methods for comparing three distributions have been proposed in the literature. These methods assess the same null hypothesis of equal distributions but differ in the alternative hypothesis they consider. The ... -
Generalization of Youden index for multiple-class classification problems applied to the assessment of externally validated cognition in Parkinson disease screening
Nakas, C. T.; Dalrymple-Alford, J. C.; Anderson, T.; Alonzo, T. A. (2013)Routine cognitive screening in Parkinson disease (PD) has become essential for management, to track progression and to assess clinical status in therapeutic trials. Patients with mild cognitive impairment (PD-MCI) are more ... -
Nonparametric Bayesian estimation of the three-way receiver operating characteristic surface
Inacio, V.; Turkman, A. A.; Nakas, C. T.; Alonzo, T. A. (2011)We describe a nonparametric Bayesian approach for estimating the three-way ROC surface based on mixtures of finite Polya trees (MFPT) priors. Mixtures of finite Polya trees are robust models that can handle nonstandard ...