Figure 2.

Gastric cancer incidence and Helicobacter pylori-related chronic gastritis stage classification based on a combination of the serum pepsinogen test and helicobacter pylori-infection diagnosis (modified from Ohata et al[23]). This shows percentages in each group, among middle-aged healthy men, based on the serum pepsinogen test and Helicobacter pylori (HP) antibody titers. As HP-related chronic gastritis stage progressed from Group A to Group D, annual incidence of gastric cancer increased in a stepwise and significant manner. PG: pepsinogen.