arXiv Statistics ML

FRESH: Information-Geometric Calibration of Patient-Level Models to Aggregate Evidence

FRESH (Fusion of Recent Evidence and Subject Histories) is a method that integrates population‑level summary results—such as published clinical trials, registry summaries, prior natural‑history studies, and peer‑reviewed indirect comparisons—into predictive models trained on patient‑level data. It recalibrates a generative model trained on patient data so that its predictions match specified aggregate statistics for a target population, achieving this with minimal perturbation in an information‑geometric sense. The recalibrated model can be used directly or to update the original generative model, enabling applications like contextualizing single‑arm trials, simulating clinical‑trial designs, and conducting comparative‑effectiveness analyses of on‑market therapies.

arXiv Computation and Language
3d ago

Foundation Models to Unlock Real-World Evidence from Nationwide Medical Claims

ReClaim is a family of generative foundation models trained on 43.8 billion administrative claims from over 200 million enrollees in the MarketScan Research Databases. The models jointly learn diagnoses, procedures, medications, and expenditures, and outperform disease‑specific gradient‑boosted models and transformer baselines in predicting more than 1,000 diseases, forecasting next‑year expenditure, and identifying high‑need, high‑cost enrollees. ReClaim’s representations also improve effect estimates in real‑world evidence studies compared with algorithm‑derived covariates, demonstrating the value of nationwide insurance claims as a scalable substrate for healthcare foundation models.

By Fan Ma, Yuntian Liu, Xiang Lan, Weipeng Zhou, Jun Ni, Mauro Giuffr\`e, Lingfei Qian, Xueqing Peng, Yujia Zhou, Ruey-Ling Weng, Huan He, Lu Li, Huiyuan Wang, Qingyu Chen, Andrew Loza, Laila Rasmy, Degui Zhi, Yuan Lu, Chenjie Zeng, Joshua C Denny, Lee Schwamm, Daniella Meeker, Brian Ondov, Lucila Ohno-Machado, Yong Chen, Hua Xu
arXiv Machine Learning
Oct 8

Patient, Place, Prior (P$^3$): What Counts as Personalization in Medical World Models?

The paper introduces Patient, Place, Prior (P³), an audit framework that evaluates whether a longitudinal medical imaging forecast benefits from a patient’s own imaging history (Patient), from patient‑matched spatial support (Place), and from predictive value beyond a population‑average model (Prior). It applies this framework to Cancer JEPA, a one‑step model that predicts future breast dynamic contrast‑enhanced MRI scans during neoadjuvant therapy, incorporating a lesion‑constrained neural correction trained with an occlusion‑based latent objective. Validation shows lower forecast error when the neural correction uses the patient’s own history and matched lesion maps, though the 95% interval comparing patient‑specific to population‑average corrections includes zero, illustrating that P³ distinguishes input usage from true patient‑specific predictive advantage.

By Xingrui Gu, Hanxue Gu, Yuxiang Zhang, Yang Yang
arXiv AI
Oct 12

Retrieval-Augmented Multimodal Language Model with Heterogeneous Evidence Integration for Clinical Prognosis

PRISM (Population‑Retrieved Inference for Structured Multimodal Prognosis) is a multimodal language model that integrates structured measurements, physiological waveforms, longitudinal history, and population context for clinical prognosis. It uses per‑feature numerical tokenization, recency‑weighted aggregation of ECGs, and a dual‑modality population memory bank, retrieving mean‑pooled embeddings of similar encounters without including individual records in the prompt. On the 1,443‑task MDS‑ED benchmark, PRISM achieves high AUROCs across diagnosis, deterioration, ICU admission, and mortality, outperforming baselines and demonstrating the value of structured multimodal integration and supervised external adaptation.

By Hamza Shafiq, Jialu Tang, Ting Dang, Jun Hu, Aaqib Saeed
arXiv Machine Learning
Jun 8

Probabilistic learning to perform pre-onset individualised prediction of disease severity: application to Veno Occlusive Disease

arXiv:2606. 06516v1 Announce Type: cross Abstract: We advance a new probabilistic supervised learning approach that permits reliable, automated, and early individualised prediction of the severity with which a disease will develop in a prospective patient.

By Dalia Chakrabarty, Kane Warrior, Chuqiao Zhang, Akash Bhojgaria, Joydeep Chakrabartty
arXiv Machine Learning
Jul 7

Coverage-Controlled Preference Mining from Noisy Claim Verification for Evidence-Grounded Generation

arXiv:2603. 10494v2 Announce Type: replace-cross Abstract: Evidence-grounded generation produces summaries whose claims should be supported by supplied evidence, but claim-level verifiers provide noisy feedback and can reward models that simply say less.

By Weixin Liu, Congning Ni, Qingyuan Song, Susannah L. Rose, Murat Kantarcioglu, Bradley A. Malin, Zhijun Yin