Cited by 10,551Explainable Artificial Intelligence (XAI)Artificial Intelligence in HealthcareData Mining Algorithms and Applications

The DOI matches its Crossref record; 45 of the 45 references it cites were found in a registry or an index.

From local explanations to global understanding with explainable AI for trees

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Abstract

Tree-based machine learning models such as random forests, decision trees, and gradient boosted trees are popular non-linear predictive models, yet comparatively little attention has been paid to explaining their predictions. Here, we improve the interpretability of tree-based models through three main contributions: 1) The first polynomial time algorithm to compute optimal explanations based on game theory. 2) A new type of explanation that directly measures local feature interaction effects. 3) A new set of tools for understanding global model structure based on combining many local explanations of each prediction. We apply these tools to three medical machine learning problems and show how combining many high-quality local explanations allows us to represent global structure while retaining local faithfulness to the original model. These tools enable us to i) identify high magnitude but low frequency non-linear mortality risk factors in the US population, ii) highlight distinct population sub-groups with shared risk characteristics, iii) identify non-linear interaction effects among risk factors for chronic kidney disease, and iv) monitor a machine learning model deployed in a hospital by identifying which features are degrading the model's performance over time. Given the popularity of tree-based machine learning models, these improvements to their interpretability have implications across a broad set of domains.

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Metadata

Authors
Lundberg, S. M., Erion, G., Chen, H., DeGrave, A., Prutkin, J. M., Nair, B., Katz, R., Himmelfarb, J., Bansal, N., & Lee, S.-I.
Affiliations
  • Microsoft (United States) (US)
  • University of Washington (US)
Corresponding author
Lee, Su-In
Venue
Nature Machine Intelligence
Published
2020-01-17
Volume
2
Issue
1
Pages
56-67
ISSN
2522-5839 (ISSN-L)
OpenAlex
W2999615587
Cited by
10,551
References
38
Citations by year
2026: 3607 · 2025: 2330 · 2024: 1650 · 2023: 1197 · 2022: 959 · 2021: 614 · 2020: 187
FWCI
291.51
Type
journal article
Language
en
Open access
Locations
  • Nature Machine Intelligence (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Science Foundation (DGE-1256082, DBI-1759487, DBI-1552309, DBI-1355899)
  • American Cancer Society (127332-RSG-15-097-01-TBG)
  • U.S. Department of Health & Human Services | National Institutes of Health (R35 GM 128638, R01 NIA AG 061132)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Explainable Artificial Intelligence (XAI)
  • Health Sciences › Health Professions › Health Information Management › Artificial Intelligence in Healthcare
  • Physical Sciences › Computer Science › Information Systems › Data Mining Algorithms and Applications
Keywords
explainable AI, tree-based models, local explanations, mortality risk, chronic kidney disease, model monitoring, machine learning in medicine

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