Table 3. The association between GEJAC and HP infection in several case-control studies.

Author	Year	Country	No. of GEJAC	Results	Statistics
Kamangar et al. [49]	2006	USA	61	Inverse association with HP+	OR, 0.31; 95% CI, 0.11–0.89
Whiteman et al. [50]	2010	Australia	307	Inverse association with HP+	OR, 0.41; 95% CI, 0.27–0.60
Inomata et al. [51]	2006	Japan	12	HP+ significantly lower than in early GNCC	P<0.05

GEJAC = gastroesophageal junction adenocarcinoma; HP = Helicobacter pylori; OR = odds ratio; CI = confidence interval; GNCC = gastric non-cardia cancer.