Evidence map›Paper›PMID 41943726›Full record

ArticleDelaware journal of public health2026

Bias Patterns in the Application of LLMs for Clinical Decision Support: A Comprehensive Study.

Raphael Poulain, Farzana Islam Adiba, Hamed Fayyaz, Rahmatollah Beheshti

Abstract read
In one paragraph

Article in Delaware journal of public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed.

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  6. Race, Ethnicity and Their Implication on Bias in Large Language Models.medRxiv : the preprint server for health sciences · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Raphael PoulainUniversity of Delaware.
Farzana Islam AdibaUniversity of Delaware.
Hamed FayyazUniversity of Delaware.
Rahmatollah BeheshtiUniversity of Delaware.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Objectives: To investigate the extent to which Large Language Models (LLMs) exhibit social bias based on protected patient attributes and to determine how design choices, such as architecture and prompting strategies, influence these observed biases in clinical decision support. Methods: We evaluated eight popular LLMs, including general-purpose and clinically trained models, across three standardized question-answering datasets using clinical vignettes. We employed red-teaming strategies to analyze the impact of demographics on LLM outputs and compared various prompting techniques, including Zero-shot and Chain of Thought. Results: Our experiments reveal various disparities across protected groups. Notably, larger models were not necessarily less biased, and medical fine-tuning did not consistently outperform general-purpose models. Furthermore, specific prompt phrasing significantly influenced bias patterns, whereas reflection-type approaches like Chain of Thought effectively reduced biased outcomes. Conclusions: LLMs demonstrate significant social biases in clinical scenarios that are influenced by model architecture and prompt engineering. These findings highlight the critical need for rigorous evaluation and enhancement of LLMs before their integration into clinical decision support systems. Consistent with prior studies, we call for additional scrutiny to ensure equity in AI-driven healthcare applications. All code and data are available at https://github.com/healthylaife/FairCDSLLM.

Identifiers

PMID41943726
PMCPMC13048765

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.