5 papers
Automatic, Debiased, and Invariant Counterfactual Generation under General Interventions
Raphael C Kim, Jingsen Zhu, Ramin Zabih +1
Generative models for counterfactual outcomes have great potential to support decision-making under complex interventions, but existing approaches are limited by unstable estimatio…
Data-Adaptive and Model-Robust Covariate Adjustment for Time-to-Event Outcomes in Stratified Randomized Trials
Raphael C. Kim, Brian Gilbert, Ramin Zabih +2
Time-to-event outcomes are commonly used as primary endpoints in randomized clinical trials. Despite this, relatively little work incorporates baseline covariate information while…
DeDPO: Debiased Direct Preference Optimization for Diffusion Models
Khiem Pham, Quang Nguyen, Tung Nguyen +4
Direct Preference Optimization (DPO) has emerged as a predominant alignment method for diffusion models, facilitating off-policy training without explicit reward modeling. However,…
Improving realistic semi-supervised learning with doubly robust estimation
Khiem Pham, Charles Herrmann, Ramin Zabih
A major challenge in Semi-Supervised Learning (SSL) is the limited information available about the class distribution in the unlabeled data. In many real-world applications this ar…
DIRI: Adversarial Patient Reidentification with Large Language Models for Evaluating Clinical Text Anonymization
John X. Morris, Thomas R. Campion, Sri Laasya Nutheti +4
Sharing protected health information (PHI) is critical for furthering biomedical research. Before data can be distributed, practitioners often perform deidentification to remove an…