Papers › TAMER: A Test-Time Adaptive MoE-Driven Framework for EHR Representation Learning

TAMER: A Test-Time Adaptive MoE-Driven Framework for EHR Representation Learning

10 Jan 2025arXiv:2501.05661archive 2025-07-28

Yinghao Zhu, Xiaochen Zheng, Ahmed Allam, Michael Krauthammer

We propose TAMER, a Test-time Adaptive MoE-driven framework for EHR Representation learning. TAMER combines a Mixture-of-Experts (MoE) with Test-Time Adaptation (TTA) to address two critical challenges in EHR modeling: patient population heterogeneity and distribution shifts. The MoE component handles diverse patient subgroups, while TTA enables real-time adaptation to evolving health status distributions when new patient samples are introduced. Extensive experiments across four real-world EHR datasets demonstrate that TAMER consistently improves predictive performance for both mortality and readmission risk tasks when combined with diverse EHR modeling backbones. TAMER offers a promising approach for dynamic and personalized EHR-based predictions in practical clinical settings. Code is publicly available at https://github.com/yhzhu99/TAMER.

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Mixture-of-ExpertsRepresentation LearningTest-time Adaptation

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