[Optimal Operational Definition of Patient with Peptic Ulcer Bleeding for Big Data Analysis Using Combination of Clinical Characteristics in a Secondary General Hospital].
The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi（2016）
Abstract
PUB was more common in older patients, and there was a clear gender difference in gastric ulcer bleeding by age. With a proper OD using PUB diagnostic codes, we can identify true patients with sufficiently high sensitivity and PPV.
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Key words
Big data,Operational definition,Peptic ulcer hemorrhage,Predictive value of tests,Sensitivity and specificity
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