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An alternative method for global and partial comparison of two diagnostic systems based on ROC curves

Title
An alternative method for global and partial comparison of two diagnostic systems based on ROC curves
Type
Article in International Scientific Journal
Year
2013
Authors
Braga, AC
(Author)
Other
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Costa, L
(Author)
Other
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oliveira, p
(Author)
ICBAS
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Journal
Vol. 83
Pages: 307-325
ISSN: 0094-9655
Publisher: Taylor & Francis
Other information
Authenticus ID: P-005-352
Abstract (EN): In this paper, an alternative method for the comparison of two diagnostic systems based on receiver operating characteristic (ROC) curves is presented. ROC curve analysis is often used as a statistical tool for the evaluation of diagnostic systems. However, in general, the comparison of ROC curves is not straightforward, in particular, when they cross each other. A similar difficulty is also observed in the multi-objective optimization field where sets of solutions defining fronts must be compared with a multi-dimensional space. Thus, the proposed methodology is based on a procedure used to compare the performance of distinct multi-objective optimization algorithms. In general, methods based on the area under the ROC curves are not sensitive to the existence of crossing points between the curves. The new approach can deal with this situation and also allows the comparison of partial portions of ROC curves according to particular values of sensitivity and specificity of practical interest. Simulations results are presented. For illustration purposes, considering real data from newborns with very low birthweight, the new method was applied in order to discriminate the better index for evaluating the risk of death.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 19
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