Diet and Risk of Gastric Cancer: An Umbrella Review.

Evidence Classification and Quality Assessment Each unique association that was nominally significant ( p -value < 0.05) was classified as strong evidence (Class I), highly suggestive evidence (Class II), suggestive evidence (Class III) or weak associations (Class IV), with regard to epidemiological validity criteria ( Table S2 ) [ 21 ].

also in 7,732 other papers