GC	Gastric cancer
Helicobacter pylori	H. Pylori
PU	Peptic ulcer
ASR	Age-standardized incidence rate
DU	Duodenal ulcer
GU	Gastric ulcer
RUT	Rapid urease test
IHC	Immunohistochemistry
OLGA	Operative link for gastritis assessment
OLGIM	Operative link on gastric intestinal metaplasia
cagA	Cytotoxin-associated gene A
vacA	Vacuolating cytotoxin
OR	Odds ratio
CI	Confidence interval
IM	Intestinal metaplasia