Cited by 179Ethics and Social Impacts of AIArtificial Intelligence in Healthcare and EducationMachine Learning in Healthcare

Unmasking bias in artificial intelligence: A systematic review of bias detection and mitigation strategies in electronic health record-based models

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Chen, Feng, Wang, Liqin, Hong, Julie, Jiang, Jiaqi, Zhou, Li·2024·Journal of the American Medical Informatics Association

Abstract

Objectives: Leveraging artificial intelligence (AI) in conjunction with electronic health records (EHRs) holds transformative potential to improve healthcare. However, addressing bias in AI, which risks worsening healthcare disparities, cannot be overlooked. This study reviews methods to handle various biases in AI models developed using EHR data. Materials and Methods: We conducted a systematic review following the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines, analyzing articles from PubMed, Web of Science, and IEEE published between January 01, 2010 and December 17, 2023. The review identified key biases, outlined strategies for detecting and mitigating bias throughout the AI model development, and analyzed metrics for bias assessment. Results: Of the 450 articles retrieved, 20 met our criteria, revealing 6 major bias types: algorithmic, confounding, implicit, measurement, selection, and temporal. The AI models were primarily developed for predictive tasks, yet none have been deployed in real-world healthcare settings. Five studies concentrated on the detection of implicit and algorithmic biases employing fairness metrics like statistical parity, equal opportunity, and predictive equity. Fifteen studies proposed strategies for mitigating biases, especially targeting implicit and selection biases. These strategies, evaluated through both performance and fairness metrics, predominantly involved data collection and preprocessing techniques like resampling and reweighting. Discussion: This review highlights evolving strategies to mitigate bias in EHR-based AI models, emphasizing the urgent need for both standardized and detailed reporting of the methodologies and systematic real-world testing and evaluation. Such measures are essential for gauging models’ practical impact and fostering ethical AI that ensures fairness and equity in healthcare.

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  • ChatGPT's responses can reflect subjective leanings originated from its data and embedded in its training, potentially skewing responses in subtle yet significant ways.

    “Thus, its responses can reflect the subjective leanings originated from its data and embedded in its training, poten­ tially skewing responses in subtle yet significant ways (Chen et al., 2024).”

    From If ChatGPT can do it, where is my creativity? generative AI boosts performance but diminishes experience in creative writing (2025) · cites this paper as Chen et al., 2024

    The Types of bias section says that preexisting bias in data can lead to biased outcomes, and the paper’s bias-handling workflow describes bias entering during model training. But the review concerns electronic-health-record-based AI models; it does not establish that ChatGPT’s responses reflect subjective leanings or describe how such leanings might subtly skew its responses. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Prior reviews of bias in ML models and mitigation strategies often overlook the importance of addressing bias across multiple levels of the development process.

    “However, these reviews often overlook the importance of addressing bias across multiple levels of the development process.”

    From Advancing Health Equity through Multi-Level Fairness in Health Informatics (2026) · cites this paper as [6]

    The Background and significance section says bias can arise at various stages of model development and stresses the importance of detecting and mitigating it. The Bias analyses workflow construction section likewise addresses three development stages. But the paper says prior reviews lacked a focus on EHR-based models; it does not say those reviews overlooked the importance of addressing bias across multiple stages. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Authors
Chen, F., Wang, L., Hong, J., Jiang, J., & Zhou, L.
Affiliations
  • Harvard University (US)
  • Brigham and Women's Hospital (US)
  • Wellesley High School , Wellesley, MA 02481, United States
Corresponding author
Chen, Feng
Venue
Journal of the American Medical Informatics Association
Published
2024-03-23
Volume
31
Issue
5
Pages
1172-1183
ISSN
  • 1067-5027 (ISSN-L)
  • 1527-974X
OpenAlex
W4393119757
Cited by
178
References
48
Citations by year
2026: 72 · 2025: 91 · 2024: 15
FWCI
13.55
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Medical Informatics Association (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion, cc-by)
  • arXiv (Cornell University) (cc-by)
Funders
National Library of Medicine (1R01LM014239)
Topics
  • Social Sciences › Safety Research › Ethics and Social Impacts of AI
  • Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
  • Physical Sciences › Computer Science › Artificial Intelligence › Machine Learning in Healthcare
Keywords
algorithmic bias, bias detection, bias mitigation, electronic health records, artificial intelligence in healthcare, health care disparities, fairness metrics, implicit bias, selection bias, confounding, measurement bias, temporal bias, resampling, reweighting, ethical AI
MeSH terms
Algorithms, Artificial Intelligence, Female, Humans, Models, Theoretical, Pregnancy, Bias, Selection Bias, Benchmarking, Electronic Health Records

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