Helicobacter pylori Antibody Titer and Gastric Cancer Screening

Figure 5

ABC method classification by H. pylori serology and pepsinogen status. Subjects are divided into four groups according to the serology of H. pylori antibody and pepsinogen (PG) status: Group A [H. pylori (−) PG (−)], Group B [H. pylori (+) PG (−)], Group C [H. pylori (+) PG (+)], and Group D [H. pylori (−) PG (+)]. The incidence of gastric cancer increases in a stepwise and significant manner from A to D. The color gradation shows the risk for gastric cancer.