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arXiv 1705.10312cs.LGcs.CEstat.AP
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重性抑郁障碍的多中心加权LASSO模型分类

Classification of Major Depressive Disorder via Multi-Site Weighted LASSO Model

Imaging Genetics Center, USC Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of the University of Southern California(南加州大学凯克医学院USC Stevens神经影像与信息学研究所影像遗传学中心);BCN NeuroImaging Center and Department of Neuroscience of the University of Groningen, University Medical Center Groningen(格罗宁根大学医学中心格罗宁根大学BCN神经影像中心与神经科学系);University of Cape Town(开普敦大学);Stanford University(斯坦福大学);City, University of London(伦敦城市大学);Imperial College London(伦敦帝国理工学院);Charité Universitätsmedizin Berlin(柏林夏里特医学院);Trinity College Dublin(都柏林圣三一学院);Otto von Guericke University Magdeburg(马格德堡奥托·冯·格里克大学);VU University Medical Center(阿姆斯特丹自由大学医学中心);Orygen, The National Centre of Excellence in Youth Mental Health(Orygen国家青少年心理健康卓越中心);The University of Melbourne(墨尔本大学)
Dajiang Zhu, Brandalyn C. Riedel, Neda Jahanshad, Nynke A. Groenewold, Dan J. Stein, Ian H. Gotlib, Matthew D. Sacchet, Danai Dima, James H. Cole, Cynthia H. Y.… 展开作者

Dajiang Zhu, Brandalyn C. Riedel, Neda Jahanshad, Nynke A. Groenewold, Dan J. Stein, Ian H. Gotlib, Matthew D. Sacchet, Danai Dima, James H. Cole, Cynthia H. Y. Fu, Henrik Walter, Ilya M. Veer, Thomas Frodl, Lianne Schmaal, Dick J. Veltman, Paul M. Thompson

摘要:

在精神病学和神经病学中,脑成像数据的大规模协作分析提供了一种新的统计力量来源,以发现提高疾病分类、鉴别诊断和结果预测准确性的特征。然而,由于数据隐私法规或对世界各地大型数据集的可访问性有限,有效集成分布式信息具有挑战性。在这里,我们提出了一种新的分类框架,通过多站点加权LASSO:每个站点执行迭代加权LASSO特征选择分开。在每次迭代中,收集分类结果和所选特征以更新每个特征的加权参数。这个新的权重用于在下一次迭代中指导LASSO过程。只保留有助于提高分类精度的特征。在对5个站点(299例重度抑郁症(MDD)患者和258例正常对照)的数据进行测试时,我们的方法平均将MDD的分类准确率提高了4.9%。这一结果显示了所提出的新策略作为大规模分布式成像和生物库数据上的机器学习的有效和实用的协作平台的潜力。

英文摘要:

Large-scale collaborative analysis of brain imaging data, in psychiatry and neu-rology, offers a new source of statistical power to discover features that boost ac-curacy in disease classification, differential diagnosis, and outcome prediction. However, due to data privacy regulations or limited accessibility to large datasets across the world, it is challenging to efficiently integrate distributed information. Here we propose a novel classification framework through multi-site weighted LASSO: each site performs an iterative weighted LASSO for feature selection separately. Within each iteration, the classification result and the selected features are collected to update the weighting parameters for each feature. This new weight is used to guide the LASSO process at the next iteration. Only the fea-tures that help to improve the classification accuracy are preserved. In tests on da-ta from five sites (299 patients with major depressive disorder (MDD) and 258 normal controls), our method boosted classification accuracy for MDD by 4.9% on average. This result shows the potential of the proposed new strategy as an ef-fective and practical collaborative platform for machine learning on large scale distributed imaging and biobank data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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