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Incorporating information retrieval into AI chatbots for patient education on thyroid eye disease

Khabaz K, Parekh Z, Saeed S, Krakauer M, Silas MR, Farooq AV, Shah H

International journal of medical informatics, 2026

Abstract

PURPOSE: To evaluate the performance of general-purpose, retrieval-augmented, and medicine-specific AI chatbots in answering common thyroid eye disease (TED) patient questions.

DESIGN: Cross-sectional comparative evaluation. Online TED forum discussion posts were collected and synthesized into 15 representative patient questions across five groups spanning clinical (treatment, diagnosis, management, epidemiology) and non-clinical topics, grouped into three difficulty levels. Three differing large language models (LLMs) generated responses were randomized and anonymized for blinded assessment.

SUBJECTS, PARTICIPANTS, AND/OR CONTROLS: Three oculoplastic surgeons evaluated clinical metrics; 3 medical students assessed non-clinical metrics.

METHODS: Three AI models generated responses: GPT-4o-mini (ChatGPT), a retrieval-augmented generation model grounded in TED literature (ChatGPT-RAG), and a specially trained LLM for healthcare professionals (OpenEvidence). Blinded raters assessed randomized responses. Statistical analysis used paired Wilcoxon signed-rank tests with Hedges' g for effect sizes.

MAIN OUTCOMES MEASURED: Clinical evaluation of responses was conducted using a 7-point Likert scale for relevance, accuracy, balance, and scope. Non-clinical metrics of empathy, understandability, and readability were also assessed using validated tools.

RESULTS: OpenEvidence significantly outperformed both ChatGPT (mean clinical score 5.96 vs 4.94; Hedges' g = 1.21, P < 0.001) and…

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