The goal of this cross-sectional study is to evaluate the efficacy of current infection marker (CIM) method for H. pylori detection. The main questions it aims to answer are: * To evaluate the efficacy of CIM method for H. pylori detection compared to rapid urease test(RUT), histopathology, polymerase chain reaction (PCR), and urea breath test (UBT) in patients who presented with upper gastrointestinal hemorrhage from peptic ulcer, and their sensitivity, specificity, accuracy, positive predictive value (PPV), negative predictive value (NPV), positive likelihood ratio, and negative likelihood ratio. * To evaluate the advantages of CIM method for H. pylori detection comparing to RUT, histopathology, PCR, and UBT in patients who presented with upper gastrointestinal hemorrhage from peptic ulcer as net reclassification index (NRI). * To study the associated factors in false negative value of H. pylori detection methods with CIM, RUT, histopathology, PCR, and UBT.
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The efficacy of CIM method for H. pylori detection
Timeframe: Through study completion, an average of 2 years