Fig. 6From: Association between methylenetetrahydrofolate reductase gene rs1801131 A/C polymorphism and urinary tumors’ susceptibilityForest plot of bladder cancer risk associated with the MTHFR rs1801131 polymorphism (CA vs. AA) by ethnicity subgroup. The squares and horizontal lines correspond to the study-specific OR and 95% CI. The area of the squares reflects the weight (inverse of the variance). The diamond represents the summary OR and 95% CIBack to article page