Papers › Doubly Robust Conformalized Survival Analysis with Right-Censored Data

Doubly Robust Conformalized Survival Analysis with Right-Censored Data

12 Dec 2024arXiv:2412.09729archive 2025-07-28

Matteo Sesia, Vladimir Svetnik

We present a conformal inference method for constructing lower prediction bounds for survival times from right-censored data, extending recent approaches designed for more restrictive type-I censoring scenarios. The proposed method imputes unobserved censoring times using a machine learning model, and then analyzes the imputed data using a survival model calibrated via weighted conformal inference. This approach is theoretically supported by an asymptotic double robustness property. Empirical studies on simulated and real data demonstrate that our method leads to relatively informative predictive inferences and is especially robust in challenging settings where the survival model may be inaccurate.

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