Cited by 997Privacy-Preserving Technologies in DataDistributed Control Multi-Agent SystemsStochastic Gradient Optimization Techniques

Federated learning of predictive models from federated Electronic Health Records

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Brisimi, Theodora S., Chen, Ruidi, Mela, Theofanie, Olshevsky, Alex, Paschalidis, Ioannis Ch., Shi, Wei·2018·International Journal of Medical Informatics

Abstract

Background In an era of "big data," computationally efficient and privacy-aware solutions for large-scale machine learning problems become crucial, especially in the healthcare domain, where large amounts of data are stored in different locations and owned by different entities. Past research has been focused on centralized algorithms, which assume the existence of a central data repository (database) which stores and can process the data from all participants. Such an architecture, however, can be impractical when data are not centrally located, it does not scale well to very large datasets, and introduces single-point of failure risks which could compromise the integrity and privacy of the data. Given scores of data widely spread across hospitals/individuals, a decentralized computationally scalable methodology is very much in need.Objective We aim at solving a binary supervised classification problem to predict hospitalizations for cardiac events using a distributed algorithm. We seek to develop a general decentralized optimization framework enabling multiple data holders to collaborate and converge to a common predictive model, without explicitly exchanging raw data.Methods We focus on the soft-margin l 1-regularized sparse Support Vector Machine (sSVM) classifier. We develop an iterative cluster Primal Dual Splitting (cPDS) algorithm for solving the large-scale sSVM problem in a decentralized fashion. Such a distributed learning scheme is relevant for multi-institutional collaborations or peer-to-peer applications, allowing the data holders to collaborate, while keeping every participant's data private.Results We test cPDS on the problem of predicting hospitalizations due to heart diseases within a calendar year based on information in the patients Electronic Health Records prior to that year. cPDS converges faster than centralized methods at the cost of some communication between agents. It also converges faster and with less communication overhead compared to an alternative distributed algorithm. In both cases, it achieves similar prediction accuracy measured by the Area Under the Receiver Operating Characteristic Curve (AUC) of the classifier. We extract important features discovered by the algorithm that are predictive of future hospitalizations, thus providing a way to interpret the classification results and inform prevention efforts.

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Crossref · 10.1016/j.ijmedinf.2018.01.007

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  • Xie et al. [485] designed a variant of local SGD in which clients locally perform Adagrad.

    “A similar scheme is used by Xie et al. [485] to design a variant of local SGD in which clients locally perform Adagrad [335, 161].”

    From Advances and Open Problems in Federated Learning (2021) · cites this paper as [485]

    The Cluster Primal Dual Splitting section (page unavailable) says the authors propose cPDS for decentralized sparse-SVM learning, and Algorithm 1 specifies primal and dual updates. That is a different method from the attributed local-SGD variant with client-side Adagrad; searches for those terms found no supporting passage. (LLM, conf=0.87)

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    Experimental — accuracy not yet measured
  • Federated learning supports predictive modeling from diverse sources and can give clinicians more insight into earlier treatment risks and benefits.

    “Federated learning has also enabled predictive modeling based on diverse sources, which can provide clinicians with additional insights into the risks and benefits of treating patients earlier [9, 10, 90].”

    From Federated Learning for Healthcare Informatics (2021) · cites this paper as [10]

    The Abstract (Objective) and Conclusions describe a federated model that uses distributed EHR data to predict future hospitalizations. The Introduction (Health application) links prediction and early prevention, but the paper does not assess the risks and benefits of treating patients earlier or show that its model gives clinicians insight into that trade-off. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Federated learning has been applied in electronic health records to represent and find clinically similar patients, predict hospitalisations due to cardiac events, mortality and ICU stay time; in medical imaging for whole-brain segmentation in MRI and brain tumour segmentation; for fMRI classification to find disease-related biomarkers; and suggested as a promising approach for COVID-19.

    “In the context of electronic health records (EHR), for example, FL helps to represent and to find clinically similar patients13,47, as well as predicting hospitalisations due to cardiac events14, mortality and ICU stay time19.”

    From The future of digital health with federated learning (2020) · cites this paper as [14]

  • In federated learning, data governance remains local, reducing privacy concerns, and only model weights or gradients are communicated between client-sites and the federated server.

    “Governance of data for FL is maintained locally, alleviating privacy concerns, with only model weights or gradients communicated between the client-sites and the federated server38,39.”
  • FL can be used to improve the perceiving and learning ability of AIoT devices such as connected vehicles for autonomous driving [199] and wearable devices for health monitoring [222], [197].

    “For example, FL can be used to improve the perceiving and learning ability of AIoT devices such as connected vehicles for autonomous driving [199] and wearable devices for health monitoring [222], [197].”

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Research works printed but not linked: 1

  1. [8]Chen R Paschalidis IC Outlier Detection Using Distributionally Robust Optimization under the Wasserstein Metric ArXiv Prepr. ArXiv170602412 2017

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Authors
Brisimi, T. S., Chen, R., Mela, T., Olshevsky, A., Paschalidis, I. C., & Shi, W.
Affiliations
  • Boston University (US)
  • Massachusetts General Hospital (US)
Corresponding author
Paschalidis, Ioannis Ch.
Venue
International Journal of Medical Informatics
Publisher
Elsevier BV
Published
2018-04
Volume
112
Pages
59-67
ISSN
1386-5056 (ISSN-L)
OpenAlex
W2783522756
Cited by
997
References
24
Citations by year
2026: 118 · 2025: 159 · 2024: 146 · 2023: 167 · 2022: 156 · 2021: 151 · 2020: 74 · 2019: 20 · 2018: 5 · 2012: 1
FWCI
35.18
Type
journal article
Language
en
Open access
Locations
  • International Journal of Medical Informatics (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Science Foundation (IIS-1724990, CNS-1645681, CCF-1527292, IIS-1237022)
  • Boston University
  • Army Research Office (W911NF-12-1-0390)
  • National Institutes of Health (1UL1TR001430)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Privacy-Preserving Technologies in Data
  • Physical Sciences › Computer Science › Computer Networks and Communications › Distributed Control Multi-Agent Systems
  • Physical Sciences › Computer Science › Artificial Intelligence › Stochastic Gradient Optimization Techniques
Keywords
federated learning, electronic health records, distributed optimization, sparse support vector machines, primal-dual splitting, binary classification, data privacy, multi-institutional collaboration, feature extraction, heart disease prevention
MeSH terms
Machine Learning, Algorithms, Hospitalization, Humans, ROC Curve, Databases, Factual, Electronic Health Records, Support Vector Machine

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