Figure 2.

Prevalence of any colorectal adenoma and advanced colorectal lesions among participants in the Women’s Antioxidant and Folic Acid Cardiovascular Study (WAFACS). Women were grouped by random assignment to combined folic acid, vitamin B₆, and vitamin B₁₂ (active treatment) or placebo. The prevalence of (A) any colorectal adenoma and (B) advanced colorectal lesions among the two treatment groups is shown. The number of women in each group at the time of follow-up is given in a table below the figure.