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    Stabilized sparse ordinal regression for medical risk stratification

    Access Status
    Fulltext not available
    Authors
    Tran, The Truyen
    Phung, D.
    Luo, W.
    Venkatesh, S.
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Tran, T.T. and Phung, D. and Luo, W. and Venkatesh, S. 2014. Stabilized sparse ordinal regression for medical risk stratification. Knowledge and Information Systems.
    Source Title
    Knowledge and Information Systems
    DOI
    10.1007/s10115-014-0740-4
    ISSN
    0219-1377
    School
    Multi-Sensor Proc & Content Analysis Institute
    URI
    http://hdl.handle.net/20.500.11937/17743
    Collection
    • Curtin Research Publications
    Abstract

    The recent wide adoption of electronic medical records (EMRs) presents great opportunities and challenges for data mining. The EMR data are largely temporal, often noisy, irregular and high dimensional. This paper constructs a novel ordinal regression framework for predicting medical risk stratification from EMR. First, a conceptual view of EMR as a temporal image is constructed to extract a diverse set of features. Second, ordinal modeling is applied for predicting cumulative or progressive risk. The challenges are building a transparent predictive model that works with a large number of weakly predictive features, and at the same time, is stable against resampling variations. Our solution employs sparsity methods that are stabilized through domain-specific feature interaction networks. We introduces two indices that measure the model stability against data resampling. Feature networks are used to generate two multivariate Gaussian priors with sparse precision matrices (the Laplacian and Random Walk). We apply the framework on a large short-term suicide risk prediction problem and demonstrate that our methods outperform clinicians to a large margin, discover suicide risk factors that conform with mental health knowledge, and produce models with enhanced stability. © 2014 Springer-Verlag London.

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