Browsing by Author "Barrio, Irantzu"
Comparison of two discrimination indexes in the categorisation of continuous predictors in time-to-event studies Barrio, Irantzu; Rodríguez-Álvarez, María Xosé; Meira-Machado, Luis; Esteban, Cristóbal; Arostegui, Inmaculada (Institut d'Estadística de Catalunya, 2017-06-21)
Open AccessThe Cox proportionalhazards model is the most widely used su rvival prediction model for analysing time-to-event data. To measure the discrimination ability of a survival model the concordance probability index is ...
On the optimism correction of the area under the receiver operating characteristic curve in logistic prediction models Iparragirre, Amaia; Barrio, Irantzu; Rodríguez-Álvarez, María Xosé (Institut d'Estadística de Catalunya, 2019-06-11)
Open AccessWhen the same data are used to fit a model and estimate its predictive performance, this estimate may be optimistic, and its correction is required. The aim of this work is to compare the behaviour of different methods ...