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Extracting Patient Case Profiles with Domain-Specific Semantic Categories

Extracting Patient Case Profiles with Domain-Specific Semantic Categories
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Author(s): Yitao Zhang (The University of Sydney, Australia)and Jon Patrick (The University of Sydney, Australia)
Copyright: 2009
Pages: 15
Source title: Information Retrieval in Biomedicine: Natural Language Processing for Knowledge Integration
Source Author(s)/Editor(s): Violaine Prince (University Montpellier 2, France)and Mathieu Roche (University Montpellier 2, France)
DOI: 10.4018/978-1-60566-274-9.ch014

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Abstract

The fast growing content of online articles of clinical case studies provides a useful source for extracting domain-specific knowledge for improving healthcare systems. However, current studies are more focused on the abstract of a published case study which contains little information about the detailed case profiles of a patient, such as symptoms and signs, and important laboratory test results of the patient from the diagnostic and treatment procedures. This paper proposes a novel category set to cover a wide variety of semantics in the description of clinical case studies which distinguishes each unique patient case. A manually annotated corpus consisting of over 5000 sentences from 75 journal articles of clinical case studies has been created. A sentence classification system which identifies 13 classes of clinically relevant content has been developed. A golden standard for assessing the automatic classifications has been established by manual annotation. A maximum entropy (MaxEnt) classifier is shown to produce better results than a Support Vector Machine (SVM) classifier on the corpus.

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