Fig. 2. Exposure-response relation between allium vegetables consumption and gastric cancer.

Best-fitting fractional polynomial models describing the relationship (solid line) with its 95% confidence intervals (CIs) (dashed lines) between the intake (g/week) of allium vegetables (a), onions (b) and garlic (c) with gastric cancer risk in the Stomach cancer Pooling (StoP) Project consortium^1,2. OR odds ratio. Footnotes: ¹Details of the models are given in Supplementary Table S4 (Supplementary materials). ²Study StoP ID #33 (Greece 2) excluded due to policy reasons on the transfer of original data.