Evaluation of Large Language Model Performance in Assessing Health Economic Study Quality.

Introduction: Economic evaluations are essential for informed healthcare decision-making but often face challenges due to inconsistent reporting and methodological complexity. Large Language Models (LLMs) offer a scalable alternative for evaluating adherence to such standards. Building on Hileas, a previously developed tool, this study assesses the accuracy of LLM-generated evaluations compared with human reviewers, aiming to quantify reliability, identify limitations, and advance automated, but assistive quality assessment methods in health economic research. Methods: In all, 110 peer-reviewed economic evaluation papers were evaluated using the CHEERS checklist through structured LLM prompts and scored by 2 human reviewers on a 0-4 ordinal scale. Interrater agreement and LLM performance were measured using Cohen's kappa, sensitivity, specificity, and area under the curve. LLM outputs were compared against human consensus ratings, and usability of the review platform was assessed with the System Usability Scale. Results: Among 2860 item-level evaluations, 25.3% showed disagreement between human reviewers, with generally low interrater reliability (kappa=-0.07 to 0.43). Compared with human consensus, the LLM achieved 72.3% to 94.7% agreement, with areas under the curve up to 0.96 but variable performance across checklist items. At the paper level, LLM-assigned CHEERS scores (median, 17) were consistently lower than human-reviewed scores (median, 18-21). Conclusion: This study demonstrated an exploratory proof-of-concept application of LLMs to research quality evaluation. Our results suggests that the LLM was generally able to provide well-reasoned evaluations that closely aligned with human assessments, although with some limitations in fully supporting its judgments.