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. 2018 Feb 26;107(2):208–216. doi: 10.1093/ajcn/nqx019

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Risk of recurrence by synthetic folic acid intake among patients who received TUR only (A) and patients who received BCG treatment after TUR (B). For synthetic folic acid intake, among men: low (<228.0 µg/d), medium (228.0–557.4 µg/d), and high (>557.4 µg/d) intakes; among women: low (<353.4 µg/d), medium (353.4–593.4 µg/d), and high (>593.4 µg/d) intakes. HRs (medium or high compared with low) and P values were based on sex-stratified Cox models adjusted for age, race/ethnicity, education, smoking status, BMI, multivitamin use, total energy intake, alcohol consumption, tumor stage, and tumor grade. BCG, bacillus Calmette-Guérin; TUR, transurethral resection.