Causal role of Helicobacter pylori infection in gastric cancer: An Asian enigma

Figure 1 Map of Asia showing frequency of Helicobacter pylori infection in each country, crude annual incidence of gastric cancer per 100 000 populations (shown within parenthesis, where data are available). The reference from where data are obtained is shown in superscript. A: frequency in the year 1984; B: lower annual incidence of gastric cancer for Indians and higher values for Chinese living in Singapore; C: studies using PCR among patients with dyspepsia; #: annual-age standardized incidence rates; $: annual age-standardized death certification rate estimated from the graph that appeared in the report (year 1998-99).