Diagnostic Methods of Helicobacter pylori Infection for Epidemiological Studies: Critical Importance of Indirect Test Validation

Figure 1

ROC curve for IgG ELISA in Bhutan (a) and Myanmar (b). The optimal cut-off points for the IgG ELISA were determined by analyzing the receiver-operating characteristic (ROC) using histology and immunohistochemistry as a gold standard.

(a)

(b)