Table 2.

Risk factors for gastric cancer

Factor	Relative risk (RR)	References
Male sex	1.95	Sung et al. 3
Family history	1.5–3.5	La Vecchia et al. 6 ; Yaghoobi et al. 51 ;Yaghoobi et al. 52
H. Pylori infection	3.8–5.8	Vohlonen et al. 53 ; Helicobacter, Cancer Collaborative Group 54 ; Kikuchi et al. 55
Smoking	1.53–1.84	Koizumi et al. 56 ; Nishino et al. 57 ; Ladeiras‐Lopes et al. 58 ; Nomura et al. 59
Heavy alcohol intake	1.20–1.65	Wang et al. 60 ; Tramacere et al. 61 ; Duell et al. 62 ; Rota et al. 63
Blood group A	1.11–1.21	Yu et al. 33 ; Wang et al. 34 ; Edgren et al. 35 ; Vasan et al. 36
Moderate‐high salt intake	1.41–1.68	D'Elia et al. 64