医療相談に対するAI回答は約76%の精度(Calling Doctor GPT: AI Responses to Healthcare Queries Are Nearly 76% Accurate)

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2026-025-28 ペンシルベニア州立大学(Penn State)

米ペンシルベニア州立大学(Penn State)の研究チームは、一般利用者が日常的な健康相談に対してAIチャットボットを利用した場合、その回答の正確性が平均約76%であることを明らかにした。研究では、34人の参加者が212件の実際または想定上の健康相談を複数の大規模言語モデル(LLM)へ入力し、生成された回答を9人の専門医が評価した。その結果、約4分の1の回答には不正確または不十分な内容が含まれており、特に神経疾患や皮膚疾患など専門性の高い分野では誤答が目立った。一方で、AIは一般的な健康情報の提供や初期的な相談支援には一定の有用性を示した。研究者らは、AIが医師を代替するのではなく、医療専門家の支援ツールとして活用される方が安全で効果的だと指摘している。また、医療知識データベースを組み合わせた検索拡張生成(RAG)技術によって回答品質の向上も期待されるが、現時点では利用者がAIの回答を過信するリスクがあると警告している。本研究は、医療分野における生成AI活用の可能性と限界を実社会データに基づいて評価した重要な成果である。

医療相談に対するAI回答は約76%の精度(Calling Doctor GPT: AI Responses to Healthcare Queries Are Nearly 76% Accurate)
Large language models like ChatGPT respond to health queries with nearly 76% accuracy, raising concerns about their trustworthiness in real-world applications, according to Penn State researchers. Credit: fizkes/Getty Images. All Rights Reserved.

<関連情報>

GPT博士が診察いたしますが、本当に必要でしょうか?クラウドソーシングによる臨床症例を用いた、医療診断における大規模言語モデルの利点と欠点の検証 Dr. GPT Will See You Now, but Should It? Exploring the Benefits and Harms of Large Language Models in Medical Diagnosis using Crowdsourced Clinical Cases

Bonam Mingole, Aditya Majumdar, Firdaus Ahmed Choudhury, Jennifer L. Kraschnewski, Shyam S. Sundar, Amulya Yadav
arXiv  Submitted on 13 Jun 2025
DOI:https://doi.org/10.48550/arXiv.2506.13805

Abstract

The proliferation of Large Language Models (LLMs) in high-stakes applications such as medical (self-)diagnosis and preliminary triage raises significant ethical and practical concerns about the effectiveness, appropriateness, and possible harmfulness of the use of these technologies for health-related concerns and queries. Some prior work has considered the effectiveness of LLMs in answering expert-written health queries/prompts, questions from medical examination banks, or queries based on pre-existing clinical cases. Unfortunately, these existing studies completely ignore an in-the-wild evaluation of the effectiveness of LLMs in answering everyday health concerns and queries typically asked by general users, which corresponds to the more prevalent use case for LLMs. To address this research gap, this paper presents the findings from a university-level competition that leveraged a novel, crowdsourced approach for evaluating the effectiveness of LLMs in answering everyday health queries. Over the course of a week, a total of 34 participants prompted four publicly accessible LLMs with 212 real (or imagined) health concerns, and the LLM generated responses were evaluated by a team of nine board-certified physicians. At a high level, our findings indicate that on average, 76% of the 212 LLM responses were deemed to be accurate by physicians. Further, with the help of medical professionals, we investigated whether RAG versions of these LLMs (powered with a comprehensive medical knowledge base) can improve the quality of responses generated by LLMs. Finally, we also derive qualitative insights to explain our quantitative findings by conducting interviews with seven medical professionals who were shown all the prompts in our competition. This paper aims to provide a more grounded understanding of how LLMs perform in real-world everyday health communication.

医療・健康
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