• Wentai Zhang, Xueyang Wu, He Wang, Ruopei Wu, Congcong Deng, Qian Xu, Xiaohai Liu, Xuexue Bai, Shuangjian Yang, Xiaoxu Li, Ming Feng, Qiang Yang, and Renzhi Wang.
• Department of Thoracic Surgery, Peking University First Hospital, Beijing, China.
• World Neurosurg. 2024 Oct 30.

BackgroundDecentralized federated learning (DFL) may serve as a useful framework for machine learning (ML) tasks in multicentered studies, maximizing the use of clinical data without data sharing. We aim to propose the first workflow of DFL for ML tasks in multicentered studies, which can be as powerful as those using centralized data.MethodsA DFL workflow was developed with four steps: registration, local computation, model update, and inspection. A total of 598 participants with acromegaly from PUMCH, and 120 participants from XWH were enrolled. The cohort from PUMCH was further split into five centers. Nine clinical features were incorporated into ML-based models trained based on four algorithms: LR, GBDT, SVM, and DNN. The area under the curve (AUC) of receiver operating characteristic curves was used to evaluate the performance of the models.ResultsModels trained based on DFL workflow performed better than most models in LR (P<0.05), all models in DNN, SVM, and GBDT (P<0.05). Models trained on DFL workflow performed as powerful as models trained on centralized data in LR, DNN, and SVM (P>0.05).ConclusionsWe demonstrate that the DFL workflow without data sharing should be a more appropriate method in ML tasks in multicentered studies. And the DFL workflow should be further exploited in clinical researches in other departments and it can encourage and facilitate multicentered studies.Copyright © 2024. Published by Elsevier Inc.

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