Document Classification

Section Type: RESULTS

Text: A total of 607 participants (59. 5 %) underwent a second follow-up, and the incidence of at least 1 colorectal adenoma was 41. 9 % for folic acid (n = 127) and 37. 2 % for placebo (n = 113) (unadjusted RR, 1. 13 ; 95 % CI, 0. 93-1. 37 ; P =. 23) ; and incidence of at least 1 advanced lesion was 11. 6 % for folic acid (n = 35) and 6. 9 % for placebo (n = 21) (unadjusted RR, 1. 67 ; 95 % CI, 1. 00-2. 80 ; P =. 05).