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Une comparaison des algorithmes d'apprentissage pour la s...
Paul Dufossé, Sébastien Benzekry · 2023-03-24 · via stat.ML updates on arXiv.org

Survival analysis is an essential tool for the study of health data. An inherent component of such data is the presence of missing values. In recent years, researchers proposed new learning algorithms for survival tasks based on neural networks. Here, we studied the predictive performance of such algorithms coupled with different methods for handling missing values on simulated data that reflect a realistic situation, i.e., when individuals belong to unobserved clusters. We investigated different patterns of missing data. The results show that, without further feature engineering, no single imputation method is better than the others in all cases. The proposed methodology can be used to compare other missing data patterns and/or survival models. The Python code is accessible via the package survivalsim. -- L'analyse de survie est un outil essentiel pour l'étude des données de santé. Une composante inhérente à ces données est la présence de valeurs manquantes. Ces dernières années, de nouveaux algorithmes d'apprentissage pour la survie, basés sur les réseaux de neurones, ont été conçus. L'objectif de ce travail est d'étudier la performance en prédiction de ces algorithmes couplés à différentes méthodes pour gérer les valeurs manquantes, sur des données simulées qui reflètent une situation rencontrée en pratique, c'est-à dire lorsque les individus peuvent être groupés selon leurs covariables. Différents schémas de données manquantes sont étudiés. Les résultats montrent que, sans l'ajout de variables supplémentaires, aucune méthode d'imputation n'est meilleure que les autres dans tous les cas. La méthodologie proposée peut être utilisée pour comparer d'autres modèles de survie. Le code en Python est accessible via le package survivalsim.