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A scalable framework for evaluating health language models
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A scalable framework for evaluating health language models
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Journal Article
A scalable framework for evaluating health language models
2026
Overview
Large language models (LLMs) have emerged as powerful tools for analyzing and interpreting complex datasets. Recent studies demonstrate their potential to generate useful, personalized responses when provided with patient-specific health information that encompasses lifestyle, biomarkers, and context. As LLM-driven health applications are increasingly adopted, rigorous and efficient one-sided evaluation methodologies are crucial to ensure response quality across multiple dimensions, including accuracy, personalization, relevance and safety. However, current evaluation practices, particularly for open-ended text responses, heavily rely on human experts. This approach introduces human factors (perspectives, potential biases, inconsistencies) and is often cost-prohibitive, labor-intensive, and hinders scalability, especially in complex domains like healthcare where response assessment necessitates domain expertise and considers multifaceted patient data, which is often nuanced and diverse. In this work, we introduce Adaptive Precise Boolean rubrics: an evaluation framework that aims to streamline human and automated evaluation of open-ended questions by identifying critical gaps in model responses using a minimal set of targeted rubric questions. Our approach is based on recent work in more general evaluation settings that contrasts a smaller set of complex evaluation targets with a larger set of more precise, granular targets answerable with simple Boolean responses. We validate this approach in metabolic health, a domain encompassing diabetes, cardiovascular disease, and obesity. Our results demonstrate that Adaptive Precise Boolean rubrics yield substantially higher inter-rater agreement among both expert and non-expert human evaluators, as well as in automated assessments, compared to traditional Likert scales, while requiring approximately half the evaluation time of Likert-based methods. This enhanced efficiency and scalability, particularly through automated evaluation and non-expert contributions, paves the way for more extensive and cost-effective evaluation of LLMs in health.
