Risk estimates for the involvement of polymorphisms in COX-2/HPGD/SLCO2A1/ABCC4 genes in colorectal cancer onset stratified by sex, smoking habits and body mass index.

aOdds ratio (OR) adjusted for age (categorical variable, using the global median age of 60 years as cutoff); CI, confidence interval; BMI, body mass index; #Categorization based on the cutoff defined by the world Health Organization for overweight people;*Never- and former-smokers pooled together.Statistical significant results are at bold.