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Unmasking bias in artificial intelligence: a systematic review of bias detection and mitigation strategies in electronic health record-based models
Open accessAbstract
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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“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).”
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Ethical Artificial Intelligence and Machine Learning in Self-Service Technologies
Ghosh, R., Çela, E., Chakraborty, S., Gupta, B., Dutta, G., Chakraborty, S., & Roy, S. (2025) · IGI Global eBooks · doi:10.4018/979-8-3373-1295-8.ch007 · Cited by 3
Akinniyi, O., Dixon, J., Aina, J., Weaks, F., Saleh, G. A., Rahman, M. M., Meeker, T. J., Trivedi, H., Gichoya, J. W., & Khalifa, F. (2025) · Computer Methods and Programs in Biomedicine · doi:10.1016/j.cmpb.2025.109036 · Cited by 3
Digital Mental Health Through an Intersectional Lens: A Narrative Review
Yesha, R., Orezzoli, M. C. E., Sims, K., & Landau, A. Y. (2026) · Healthcare · doi:10.3390/healthcare14020211 · Cited by 4
“Several forms of bias can arise throughout the lifecycle of AI systems, including during data collection, clinical documentation, model design, and implementation, which perpetuate existing disparities in mental health care [34–37].”
Hooshmandi, S., Tabatabaii, M., Arani, H. Z., Heidarian, A., & Nazemi, S. (2026) · Discover Artificial Intelligence · doi:10.1007/s44163-026-00843-x · Cited by 3
Addressing Bias and Ensuring Fairness in AI Systems for Healthcare
Zarnegar, A. (2025) · Health Informatics and Knowledge Management Conference (HIKM) · doi:10.1145/3774816.3774817 · Cited by 3
Mitigating Algorithmic Bias in Cancer Site Classification Models
Shivanna, A., Spannaus, A., Tschida, J., Gounley, J. P., Krawczuk, P., & Hanson, H. A. (2026) · JCO Clinical Cancer Informatics · doi:10.1200/cci-25-00250 · Cited by 3
Wang, H. J., Shi, G., Liu, X., Zhang, J., Chen, S., Shi, J., Li, Y., Yue, G., & Wu, Y. (2026) · Expert Systems · doi:10.1111/exsy.70259 · Cited by 5
Artificial Intelligence Across the Drug Development Lifecycle
Demyashkin, G. A., Алексеевич, П. М., Zyryanov, S., Yavorskiy, A., Shegai, P., & Kaprin, A. (2026) · Medical Sciences · doi:10.3390/medsci14020248 · Cited by 4
“The risk of AI models amplifying errors or pre-existing biases in their training data is a significant concern, raising questions about the generalizability of insights across diverse patient populations and the ethical implications of biased outcomes [249,250].”
Kansal, M., Sibal, R., & Ram, P. (2024) · Communications in computer and information science · doi:10.1007/978-3-031-77029-6_8 · Cited by 2
Applying Artificial Neural Networks to Estimate PMI: A New Era of Accuracy in Forensic Science
Ouanes, K. (2025) · Springer eBooks · doi:10.1007/978-981-96-4585-5_11 · Cited by 2
Efthymiou, E., Katsarou, D. V., Sofologi, M., Megari, K., Papadopoulou, S. L., Mantsos, E., Argyriadis, A., & Argyriadi, A. (2025) · Advances in computational intelligence and robotics book series · doi:10.4018/979-8-3373-0573-8.ch009 · Cited by 2
Nejadshamsi, S., Chu, C. H., McGilton, K. S., Li, X., Ronquillo, C., & Rahimi, S. A. (2025) · JAMIA Open · doi:10.1093/jamiaopen/ooaf171 · Cited by 2
“Chen et al. 26 investigated the impact of preprocessing methods such as reweighting and synthetic oversampling, which were shown to improve fairness in electronic health record (EHR)-based models without significantly compromising predictive accuracy.”
Abouelmagd, K., Saleem, N., Kuhn, K., Oyedele, T. J., Abdelbar, S. M. M., Rath, S., & Alsabri, M. (2025) · Current Emergency and Hospital Medicine Reports · doi:10.1007/s40138-025-00334-w · Cited by 2
“The majority of existing AI models are trained on data from adult populations and high-income countries (HICs), severely limiting their generalizability to the unique anatomical and physiological characteristics of children, particularly neonates and infants [50, 51].”
Bouterse, A., Pruneski, J. A., Oettl, F. C., Zsidai, B., Tischer, T., Longo, U. G., Seil, R., Hirschmann, M. T., & Samuelsson, K. (2026) · Knee Surgery Sports Traumatology Arthroscopy · doi:10.1002/ksa.70339 · Cited by 2
“Additionally, the integrity of AI models is dependent on the data they are trained on, allowing imbalanced or incomplete datasets to introduce algorithmic bias into decision ‐ making models that in fl uence aspects of clinical care [15, 17, 36, 48, 53, 73].”
Lim, Y. X., Ming, L. C., Ng, N. C., Leow, S., & Ingle, R. G. (2026) · Discover Computing · doi:10.1007/s10791-026-10205-x · Cited by 3
“Where imbalances exist, technical fixes can be applied, such as oversampling underrepresented groups, undersampling majority groups, reweighting data points to give more importance to minority samples, or using data augmentation to synthetically create more data for sparse classes [79, 81, 82] [–].”
The BEETS framework for responsible artificial intelligence
Tettegah, S. (2026) · Discover Artificial Intelligence · doi:10.1007/s44163-026-01597-2 · Cited by 3
“The literature on artificial intelligence (AI) often focuses on key themes such as security, ethics, equity, bias, trust, and fairness [11, 19].”
Zhao, Q., Jiang, W., Zhang, C., Ouyang, M., Wu, N., & Guo, Y. (2026) · Frontiers in Public Health · doi:10.3389/fpubh.2026.1863050 · Cited by 3
“This missing pattern reflects structural inequalities such as digital access barriers or specific employment systems, which go beyond the scope of random technical failures (83, 84).”
Bashir, S., Salad, H. A., Abdullahi, Y. B., Abdi, Y. H., Abdi, M. S., Ahmed, N., Musa, S. S., Elehamer, N. M. K., Musa, M. K., Bolarinwa, O. A., et al. (2026) · Frontiers in Digital Health · doi:10.3389/fdgth.2026.1841706 · Cited by 4
Accuracy of administrative data in ascertaining health conditions: a systematic review
Campbell, A. C., Tyler, J., Shuttleworth, R. R., Pearce, L. A., Heerde, J. A., Borschmann, R., Sawyer, S. M., Preen, D. B., Kinner, S. A., & Calais‐Ferreira, L. (2026) · JAMIA Open · doi:10.1093/jamiaopen/ooag109 · Cited by 2
“52 When the underlying codes have variable accuracy, particularly for sensitivity and PPV, these models risk inheriting and amplifying biases in clinical predictions and resource allocation that are difficult to detect and correct once embedded in automated processes.”
AI in the Team Meeting Landscape
Allen, J. A., Grabowski, M., Thiese, M. S., & Eden, E. (2026) · Emerald Group Publishing Limited eBooks · doi:10.1108/s1534-085620260000021010 · Cited by 2
Rudroff, T. (2025) · Infectious Disease Reports · doi:10.3390/idr17020033 · Cited by 2
“, and metabolic indicators, to generate comprehensive risk assessments [59].”
Assessing the risk of discriminatory bias in classification datasets
Dai, K., Kim, J., Džeroski, S., Wicker, J. S., Dobbie, G., & Dost, K. (2025) · Machine Learning · doi:10.1007/s10994-025-06843-9 · Cited by 2
“This approach is particularly problematic if the practitioner is unaware of the bias; even more so in numeric datasets such as in healthcare data, where patients are defined by their age and numeric lab results rather than their gender or race (Chen et al., 2024).”
Narasannagari, L., & Bhardwaj, D. S. (2025) · Advances in computational intelligence and robotics book series · doi:10.4018/979-8-3693-9521-9.ch003 · Cited by 2
Moving forward on the science of informatics and predictive analytics
Henry, S. B. (2024) · Journal of the American Medical Informatics Association · doi:10.1093/jamia/ocae077 · Cited by 2
AI-Powered clinical assessments: GPT-4o’s role in standardizing CPR skill evaluations
Semeraro, F. F. (2024) · Resuscitation · doi:10.1016/j.resuscitation.2024.110411 · Cited by 2
Frasier, K. M., Hash, M. G., & Pugliese, A. (2025) · Cureus · doi:10.7759/cureus.79109 · Cited by 1
“This is often due to biases in the training data or differences between the model’s training population and real-world application, underscoring the need for further refinement in predictive algorithms [16].”
Demiral, Y. E., & Alsahag, A. M. M. (2025) · Lecture notes in computer science · doi:10.1007/978-981-96-6389-7_32 · Cited by 1
Muñoz-García, V., Consuegra‐Ayala, J. P., & Moreda, P. (2025) · Knowledge-Based Systems · doi:10.1016/j.knosys.2025.113915 · Cited by 1
Emerging Trends in Early Dementia Diagnosis: An Analysis on Advanced Machine Learning Approaches
Gami, B., Agrawal, M., & Katarya, R. (2025) · ACM Computing Surveys · doi:10.1145/3764578 · Cited by 1
“Similarly, Chen et al. [16] suggested systematic bias detection and mitigation techniques.”
Pelka, O., Sigle, S., Werner, P., Schweizer, S. T., Iancu, A., Scherer, L., Kamzol, N. A., Eil, J. H., Apfelbacher, T., Seletkov, D., et al. (2025) · RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren · doi:10.1055/a-2651-6653 · Cited by 1
Translating Features to Findings: Deep Learning for Melanoma Subtype Prediction
Guermazi, D., Khemchandani, S., Wahood, S., Nguyen, C. V., & Saliba, E. (2025) · Dermatopathology · doi:10.3390/dermatopathology12040042 · Cited by 1
Lee, J. T., Hsu, S. H., Li, V. C.-S., Anindya, K., Chen, M. M., Wang, C. I., Shen, T. K.-B., Liu, V. T. N., Chen, H.-H., & Atun, R. A. (2025) · PLOS Digital Health · doi:10.1371/journal.pdig.0000951 · Cited by 1
“Addressing these gaps requires fairness-enhancing techniques, such as the Disparate Impact Remover, to ensure consistent model accuracy across diverse groups [19,21].”
InfluentialBalancing Innovation and Responsibility: Ethical and Privacy Challenges in Stroke Digital Health
Muchada, M., Rizzo, F., Brunelli, N., & Molina, C. A. (2025) · Stroke · doi:10.1161/strokeaha.125.050450 · Cited by 1
Golovenko, M. Y., & Larionov, V. (2025) · Artificial Intelligence · doi:10.15407/jai2025.04.010 · Cited by 2
A Meta-Analytic NLP-Driven Mapping of Fairness in Healthcare AI
Tsoni, R., Koutouzis, M., & Verykios, V. S. (2025) · International Conference on Information, Intelligence, Systems & Applications (IISA) · doi:10.1109/iisa66859.2025.11311222 · Cited by 1
Alzahrani, F., & Alnezary, F. S. (2026) · Frontiers in Public Health · doi:10.3389/fpubh.2026.1763446 · Cited by 1
“This ongoing vigilance supports a dynamic, adaptive approach to equity within organizational practice (64, 65).”
Qu, H., Li, J., Gao, Y., Xu, X.-M., Zhang, X.-B., & Yang, S.-D. (2026) · Frontiers in Artificial Intelligence · doi:10.3389/frai.2026.1807400 · Cited by 1
AI for TCM: From target identification to drug design
Wang, M., Wang, W., Shen, M., Fan, X., & Liao, J. (2026) · Journal of Pharmaceutical Analysis · doi:10.1016/j.jpha.2026.101681 · Cited by 1
Metadata
- 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
- Publisher
- Oxford University Press (OUP)
- Published
- 2024-03-23
- Volume
- 31
- Issue
- 5
- Pages
- 1172-1183
- ISSN
- 1067-5027 (ISSN-L)
- 1527-974X
- PMC
- PMC11031231
- 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
- green
- www.ncbi.nlm.nih.gov
- 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
- Physical Sciences › Computer Science › Artificial Intelligence › 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
About these checks
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