A cascade of classifiers for extracting medication information from discharge summaries
نویسندگان
چکیده
BACKGROUND Extracting medication information from clinical records has many potential applications, and recently published research, systems, and competitions reflect an interest therein. Much of the early extraction work involved rules and lexicons, but more recently machine learning has been applied to the task. METHODS We present a hybrid system consisting of two parts. The first part, field detection, uses a cascade of statistical classifiers to identify medication-related named entities. The second part uses simple heuristics to link those entities into medication events. RESULTS The system achieved performance that is comparable to other approaches to the same task. This performance is further improved by adding features that reference external medication name lists. CONCLUSIONS This study demonstrates that our hybrid approach outperforms purely statistical or rule-based systems. The study also shows that a cascade of classifiers works better than a single classifier in extracting medication information. The system is available as is upon request from the first author.
منابع مشابه
Extracting Medication Information from Discharge Summaries
Extracting medication information from clinical records has many potential applications and was the focus of the i2b2 challenge in 2009. We present a hybrid system, comprised of machine learning and rule-based modules, for medication information extraction. With only a handful of template-filling rules, the system’s core is a cascade of statistical classifiers for field detection. It achieved g...
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متن کاملTitle: Recognition of Medication Related Entities from Discharge Summaries Using Ensembles of Classifiers
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Do electronic discharge summaries contain more complete medication information? A retrospective analysis of paper versus electronic discharge summaries.
Complete, accurate and timely hospital discharge summaries are important for continuity of care. The aim of this study was to evaluate the effectiveness of an electronic discharge summary system in improving the medication information provided compared to the information in paper discharge summaries. We conducted a retrospective audit of 199 paper and 200 electronic discharge summaries from a 3...
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عنوان ژورنال:
دوره 2 شماره
صفحات -
تاریخ انتشار 2011