Table 1.

Search query and refinement procedure.

Set	Results	Refinement
1	4364	Step1: TI = (“Tumor*” OR “Tumour*” OR “Cancer*” OR “Neoplasia*” OR “Neoplasm*” OR “Carcinoma*” OR “Malignanc*” OR “Oncolog*” OR “Adenocarcinoma*” OR “Carcinogen*” OR “Oncogen*”) AND TS = (“Gastric” or “Stomach”) Step2: TI= (Helicobacter pylori or H.pylori) Step3: 1 AND 2
2	2456	Refined by DOCUMENT TYPES: (ARTICLES OR REVIEW ARTICLES)
3	1970	Refined by PUBLICATION YEARS: (2003–2022)