Dietary intake of folic acid and colorectal cancer risk in a cohort of women

Paul Terry, Meera Jain, Anthony B. Miller, Geoffrey R. Howe, Thomas E. Rohan

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Folate is crucial for normal DNA methylation, synthesis and repair, and deficiency of this nutrient is hypothesized to lead to cancer through disruption of these processes. There is some evidence to suggest that relatively high dietary folate intake might be associated with reduced colorectal cancer risk, especially among individuals with low methionine intake. A case-cohort analysis was undertaken within the cohort of 56,837 women who were enrolled in the Canadian National Breast Screening Study and who completed a selfadministered dietary questionnaire. During follow-up to the end of 1993, a total of 389 women were diagnosed with colorectal cancer, identified by linkage to the Canadian Cancer Database. For comparative purposes, a subcohort of 5,681 women was randomly selected from the full dietary cohort at baseline. After exclusions for various reasons, the analyses were based on 295 cases and 5,334 non-cases. Folate intake was inversely associated with colorectal cancer risk (IRR = 0.6, 95% CI = 0.4-1.1, p for trend = 0.25). The inverse association was essentially similar among individuals with low and high methionine intake, and was similar for colon and rectal cancers when those endpoints were analyzed separately. Among individuals with low methionine intake, folate intake did not appear to lower the risk of rectal cancer, a finding that may be due, in part, to the low number of cases in the subgroup analysis. Overall, our data lend some support to the hypothesis that high folate intake is associated with a reduced risk of colorectal cancer.

Original languageEnglish (US)
Pages (from-to)864-867
Number of pages4
JournalInternational Journal of Cancer
Volume97
Issue number6
DOIs
StatePublished - Feb 20 2002

Fingerprint

Folic Acid
Colorectal Neoplasms
Methionine
Rectal Neoplasms
DNA Methylation
DNA Repair
Colonic Neoplasms
Neoplasms
Breast
Cohort Studies
Databases
Food

Keywords

  • Cohort studies
  • Colorectal neoplasms
  • Diet
  • Folic acid
  • Methionine

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Dietary intake of folic acid and colorectal cancer risk in a cohort of women. / Terry, Paul; Jain, Meera; Miller, Anthony B.; Howe, Geoffrey R.; Rohan, Thomas E.

In: International Journal of Cancer, Vol. 97, No. 6, 20.02.2002, p. 864-867.

Research output: Contribution to journalArticle

Terry, Paul ; Jain, Meera ; Miller, Anthony B. ; Howe, Geoffrey R. ; Rohan, Thomas E. / Dietary intake of folic acid and colorectal cancer risk in a cohort of women. In: International Journal of Cancer. 2002 ; Vol. 97, No. 6. pp. 864-867.
@article{fee0949d23a8487ea85b50780f24721e,
title = "Dietary intake of folic acid and colorectal cancer risk in a cohort of women",
abstract = "Folate is crucial for normal DNA methylation, synthesis and repair, and deficiency of this nutrient is hypothesized to lead to cancer through disruption of these processes. There is some evidence to suggest that relatively high dietary folate intake might be associated with reduced colorectal cancer risk, especially among individuals with low methionine intake. A case-cohort analysis was undertaken within the cohort of 56,837 women who were enrolled in the Canadian National Breast Screening Study and who completed a selfadministered dietary questionnaire. During follow-up to the end of 1993, a total of 389 women were diagnosed with colorectal cancer, identified by linkage to the Canadian Cancer Database. For comparative purposes, a subcohort of 5,681 women was randomly selected from the full dietary cohort at baseline. After exclusions for various reasons, the analyses were based on 295 cases and 5,334 non-cases. Folate intake was inversely associated with colorectal cancer risk (IRR = 0.6, 95{\%} CI = 0.4-1.1, p for trend = 0.25). The inverse association was essentially similar among individuals with low and high methionine intake, and was similar for colon and rectal cancers when those endpoints were analyzed separately. Among individuals with low methionine intake, folate intake did not appear to lower the risk of rectal cancer, a finding that may be due, in part, to the low number of cases in the subgroup analysis. Overall, our data lend some support to the hypothesis that high folate intake is associated with a reduced risk of colorectal cancer.",
keywords = "Cohort studies, Colorectal neoplasms, Diet, Folic acid, Methionine",
author = "Paul Terry and Meera Jain and Miller, {Anthony B.} and Howe, {Geoffrey R.} and Rohan, {Thomas E.}",
year = "2002",
month = "2",
day = "20",
doi = "10.1002/ijc.10138",
language = "English (US)",
volume = "97",
pages = "864--867",
journal = "International Journal of Cancer",
issn = "0020-7136",
publisher = "Wiley-Liss Inc.",
number = "6",

}

TY - JOUR

T1 - Dietary intake of folic acid and colorectal cancer risk in a cohort of women

AU - Terry, Paul

AU - Jain, Meera

AU - Miller, Anthony B.

AU - Howe, Geoffrey R.

AU - Rohan, Thomas E.

PY - 2002/2/20

Y1 - 2002/2/20

N2 - Folate is crucial for normal DNA methylation, synthesis and repair, and deficiency of this nutrient is hypothesized to lead to cancer through disruption of these processes. There is some evidence to suggest that relatively high dietary folate intake might be associated with reduced colorectal cancer risk, especially among individuals with low methionine intake. A case-cohort analysis was undertaken within the cohort of 56,837 women who were enrolled in the Canadian National Breast Screening Study and who completed a selfadministered dietary questionnaire. During follow-up to the end of 1993, a total of 389 women were diagnosed with colorectal cancer, identified by linkage to the Canadian Cancer Database. For comparative purposes, a subcohort of 5,681 women was randomly selected from the full dietary cohort at baseline. After exclusions for various reasons, the analyses were based on 295 cases and 5,334 non-cases. Folate intake was inversely associated with colorectal cancer risk (IRR = 0.6, 95% CI = 0.4-1.1, p for trend = 0.25). The inverse association was essentially similar among individuals with low and high methionine intake, and was similar for colon and rectal cancers when those endpoints were analyzed separately. Among individuals with low methionine intake, folate intake did not appear to lower the risk of rectal cancer, a finding that may be due, in part, to the low number of cases in the subgroup analysis. Overall, our data lend some support to the hypothesis that high folate intake is associated with a reduced risk of colorectal cancer.

AB - Folate is crucial for normal DNA methylation, synthesis and repair, and deficiency of this nutrient is hypothesized to lead to cancer through disruption of these processes. There is some evidence to suggest that relatively high dietary folate intake might be associated with reduced colorectal cancer risk, especially among individuals with low methionine intake. A case-cohort analysis was undertaken within the cohort of 56,837 women who were enrolled in the Canadian National Breast Screening Study and who completed a selfadministered dietary questionnaire. During follow-up to the end of 1993, a total of 389 women were diagnosed with colorectal cancer, identified by linkage to the Canadian Cancer Database. For comparative purposes, a subcohort of 5,681 women was randomly selected from the full dietary cohort at baseline. After exclusions for various reasons, the analyses were based on 295 cases and 5,334 non-cases. Folate intake was inversely associated with colorectal cancer risk (IRR = 0.6, 95% CI = 0.4-1.1, p for trend = 0.25). The inverse association was essentially similar among individuals with low and high methionine intake, and was similar for colon and rectal cancers when those endpoints were analyzed separately. Among individuals with low methionine intake, folate intake did not appear to lower the risk of rectal cancer, a finding that may be due, in part, to the low number of cases in the subgroup analysis. Overall, our data lend some support to the hypothesis that high folate intake is associated with a reduced risk of colorectal cancer.

KW - Cohort studies

KW - Colorectal neoplasms

KW - Diet

KW - Folic acid

KW - Methionine

UR - http://www.scopus.com/inward/record.url?scp=0037138435&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037138435&partnerID=8YFLogxK

U2 - 10.1002/ijc.10138

DO - 10.1002/ijc.10138

M3 - Article

C2 - 11857369

AN - SCOPUS:0037138435

VL - 97

SP - 864

EP - 867

JO - International Journal of Cancer

JF - International Journal of Cancer

SN - 0020-7136

IS - 6

ER -