Effect of combined folic acid, vitamin B6, and vitamin B 12 on colorectal adenoma

Yiqing Song, Joann E. Manson, I. Min Lee, Nancy R. Cook, Ligi Paul, Jacob Selhub, Edward Giovannucci, Shumin M. Zhang

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Background Folic acid, vitamin B6, and vitamin B12 act in concert in the one-carbon metabolism and may protect against colorectal neoplasia. We examined the effect of combined B-vitamin treatment on the occurrence of colorectal adenoma.MethodsThe Women's Antioxidant and Folic Acid Cardiovascular Study was a randomized, double-blind, placebo-controlled trial of 5442 female health professionals at high risk for cardiovascular disease from April 1998 through July 2005. Participants were randomly assigned to receive a combination pill of folic acid (2.5mg), vitamin B6 (50mg), and vitamin B12 (1mg) or placebo. This study included 1470 participants who were followed up for as long as 9.2 years and underwent an endoscopy at any point during follow-up. We estimated relative risks using a generalized linear model with a natural logarithm link function and Poisson distributed errors. All statistical tests were two-sided. Results The risk of colorectal adenoma was similar among participants receiving treatment (24.3%, 180 of 741 participants) vs placebo (24.0%, 175 of 729 participants) (multivariable adjusted relative risk = 1.00, 95% confidence interval = 0.83 to 1.20). Treatment was not associated with the risk of adenoma when data were analyzed by subsite, size, stage, and the number of adenomas. There was no statistically significant effect modification by alcohol intake, history of cancer or adenoma, or baseline plasma levels or intakes of folate, vitamin B6, or vitamin B 12. Conclusion Our results indicate no statistically significant effect of combined folic acid, vitamin B6, and vitamin B12 treatment on colorectal adenoma among women at high risk for cardiovascular disease.

Original languageEnglish (US)
Pages (from-to)1562-1575
Number of pages14
JournalJournal of the National Cancer Institute
Volume104
Issue number20
DOIs
StatePublished - Oct 17 2012
Externally publishedYes

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Vitamin B 6
Vitamin B 12
Folic Acid
Adenoma
Placebos
Cardiovascular Diseases
Vitamin B Complex
Therapeutics
Endoscopy
Linear Models
Neoplasms
Carbon
Antioxidants
Alcohols
Confidence Intervals
Health

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Song, Y., Manson, J. E., Lee, I. M., Cook, N. R., Paul, L., Selhub, J., ... Zhang, S. M. (2012). Effect of combined folic acid, vitamin B6, and vitamin B 12 on colorectal adenoma. Journal of the National Cancer Institute, 104(20), 1562-1575. https://doi.org/10.1093/jnci/djs370

Effect of combined folic acid, vitamin B6, and vitamin B 12 on colorectal adenoma. / Song, Yiqing; Manson, Joann E.; Lee, I. Min; Cook, Nancy R.; Paul, Ligi; Selhub, Jacob; Giovannucci, Edward; Zhang, Shumin M.

In: Journal of the National Cancer Institute, Vol. 104, No. 20, 17.10.2012, p. 1562-1575.

Research output: Contribution to journalArticle

Song, Y, Manson, JE, Lee, IM, Cook, NR, Paul, L, Selhub, J, Giovannucci, E & Zhang, SM 2012, 'Effect of combined folic acid, vitamin B6, and vitamin B 12 on colorectal adenoma', Journal of the National Cancer Institute, vol. 104, no. 20, pp. 1562-1575. https://doi.org/10.1093/jnci/djs370
Song, Yiqing ; Manson, Joann E. ; Lee, I. Min ; Cook, Nancy R. ; Paul, Ligi ; Selhub, Jacob ; Giovannucci, Edward ; Zhang, Shumin M. / Effect of combined folic acid, vitamin B6, and vitamin B 12 on colorectal adenoma. In: Journal of the National Cancer Institute. 2012 ; Vol. 104, No. 20. pp. 1562-1575.
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abstract = "Background Folic acid, vitamin B6, and vitamin B12 act in concert in the one-carbon metabolism and may protect against colorectal neoplasia. We examined the effect of combined B-vitamin treatment on the occurrence of colorectal adenoma.MethodsThe Women's Antioxidant and Folic Acid Cardiovascular Study was a randomized, double-blind, placebo-controlled trial of 5442 female health professionals at high risk for cardiovascular disease from April 1998 through July 2005. Participants were randomly assigned to receive a combination pill of folic acid (2.5mg), vitamin B6 (50mg), and vitamin B12 (1mg) or placebo. This study included 1470 participants who were followed up for as long as 9.2 years and underwent an endoscopy at any point during follow-up. We estimated relative risks using a generalized linear model with a natural logarithm link function and Poisson distributed errors. All statistical tests were two-sided. Results The risk of colorectal adenoma was similar among participants receiving treatment (24.3{\%}, 180 of 741 participants) vs placebo (24.0{\%}, 175 of 729 participants) (multivariable adjusted relative risk = 1.00, 95{\%} confidence interval = 0.83 to 1.20). Treatment was not associated with the risk of adenoma when data were analyzed by subsite, size, stage, and the number of adenomas. There was no statistically significant effect modification by alcohol intake, history of cancer or adenoma, or baseline plasma levels or intakes of folate, vitamin B6, or vitamin B 12. Conclusion Our results indicate no statistically significant effect of combined folic acid, vitamin B6, and vitamin B12 treatment on colorectal adenoma among women at high risk for cardiovascular disease.",
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AU - Paul, Ligi

AU - Selhub, Jacob

AU - Giovannucci, Edward

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N2 - Background Folic acid, vitamin B6, and vitamin B12 act in concert in the one-carbon metabolism and may protect against colorectal neoplasia. We examined the effect of combined B-vitamin treatment on the occurrence of colorectal adenoma.MethodsThe Women's Antioxidant and Folic Acid Cardiovascular Study was a randomized, double-blind, placebo-controlled trial of 5442 female health professionals at high risk for cardiovascular disease from April 1998 through July 2005. Participants were randomly assigned to receive a combination pill of folic acid (2.5mg), vitamin B6 (50mg), and vitamin B12 (1mg) or placebo. This study included 1470 participants who were followed up for as long as 9.2 years and underwent an endoscopy at any point during follow-up. We estimated relative risks using a generalized linear model with a natural logarithm link function and Poisson distributed errors. All statistical tests were two-sided. Results The risk of colorectal adenoma was similar among participants receiving treatment (24.3%, 180 of 741 participants) vs placebo (24.0%, 175 of 729 participants) (multivariable adjusted relative risk = 1.00, 95% confidence interval = 0.83 to 1.20). Treatment was not associated with the risk of adenoma when data were analyzed by subsite, size, stage, and the number of adenomas. There was no statistically significant effect modification by alcohol intake, history of cancer or adenoma, or baseline plasma levels or intakes of folate, vitamin B6, or vitamin B 12. Conclusion Our results indicate no statistically significant effect of combined folic acid, vitamin B6, and vitamin B12 treatment on colorectal adenoma among women at high risk for cardiovascular disease.

AB - Background Folic acid, vitamin B6, and vitamin B12 act in concert in the one-carbon metabolism and may protect against colorectal neoplasia. We examined the effect of combined B-vitamin treatment on the occurrence of colorectal adenoma.MethodsThe Women's Antioxidant and Folic Acid Cardiovascular Study was a randomized, double-blind, placebo-controlled trial of 5442 female health professionals at high risk for cardiovascular disease from April 1998 through July 2005. Participants were randomly assigned to receive a combination pill of folic acid (2.5mg), vitamin B6 (50mg), and vitamin B12 (1mg) or placebo. This study included 1470 participants who were followed up for as long as 9.2 years and underwent an endoscopy at any point during follow-up. We estimated relative risks using a generalized linear model with a natural logarithm link function and Poisson distributed errors. All statistical tests were two-sided. Results The risk of colorectal adenoma was similar among participants receiving treatment (24.3%, 180 of 741 participants) vs placebo (24.0%, 175 of 729 participants) (multivariable adjusted relative risk = 1.00, 95% confidence interval = 0.83 to 1.20). Treatment was not associated with the risk of adenoma when data were analyzed by subsite, size, stage, and the number of adenomas. There was no statistically significant effect modification by alcohol intake, history of cancer or adenoma, or baseline plasma levels or intakes of folate, vitamin B6, or vitamin B 12. Conclusion Our results indicate no statistically significant effect of combined folic acid, vitamin B6, and vitamin B12 treatment on colorectal adenoma among women at high risk for cardiovascular disease.

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