smoothROCtime: an R package for time-dependent ROC curve estimation

Susana Díaz-Coto (), Pablo Martínez-Camblor and Sonia Pérez-Fernández
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Susana Díaz-Coto: University of Oviedo
Pablo Martínez-Camblor: Dartmouth College
Sonia Pérez-Fernández: University of Oviedo

Computational Statistics, 2020, vol. 35, issue 3, No 13, 1251 pages

Abstract: Abstract The receiver operating characteristic (ROC) curve has become one of the most used tools for analyzing the diagnostic capacity of continuous biomarkers. When the studied outcome is a time-dependent variable two main generalizations have been proposed, based on properly extensions of the sensitivity and the specificity. Different procedures have been suggested for their estimation mainly under the presence of right censorship. Most of them have been implemented, as well, in diverse types of software, including R packages. This work focuses on the R implementation for the smooth estimation of time-dependent ROC curves. The theoretical connection between them through the joint distribution function of the biomarker and time-to-event variables prompts an approximation method: considered estimators are based on the bivariate kernel density estimator for the joint density function of the bidimensional variable (Marker, Time-to-event). The use of the package is illustrated with two real-world examples.

Keywords: (Bio)markers; Time-dependent outcomes; Time-dependent ROC curve; Smooth time-dependent ROC curve estimation; Area under the curve (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1007/s00180-020-00955-7

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