Should we pay more attention to the potential link between Helicobacter pylori and esophageal cancer in Asian countries

Table 1 Characteristics of included literatures studied in Asian countries

Ref.	Publication year	Study country	Study type	Study object	Case		Control
					H. pylori +	H. pylori -	H. pylori +	H. pylori -
Wang et al[18]	2003	China	Case-control	ESSC	33	30	145	165
Wu et al[19]	2009	China	Case-control	ESSC	112	205	563	540
Wu et al[20]	2005	China	Case-control	ESSC	28	99	74	97
Kamangar et al[21]	2007	China	Case-control	ESSC	254	81	662	330
Iijima et al[22]	2007	Japan	Case-control	ESSC	60	13	56	17
Hu et al[23]	2009	China	Case-control	ESSC	66	114	102	92
Xue et al[24]	2013	China	Cohort	ESSC	7	3	988	503
Poosari et al[25]	2023	Thailand	Case-control	Esophageal cancer	83	22	40	68
Gao et al[26]	2022	China	Case-control	Adenocarcinoma of the esophagogastric junction	270	345	1221	1857

ESCC: Esophageal squamous cell carcinoma; H. pylori: Helicobacter pylori.