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Long term dietary folate decreased risk of colon cancer in women

https://doi.org/10.1136/ebn.2.2.55

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    Giovannucci E, Stampfer MJ, Colditz GA, et al.Multivitamin use, folate, and colon cancer in women in the Nurses' Health Study.Ann Intern Med1998 Oct 1;129:517–24OpenUrlCrossRefPubMedWeb of Science

    Question Is folate intake from diet or dietary supplements associated with a decreased risk of colon cancer in women?

    Design

    Population based cohort study of women in the Nurses' Health Study with 14 years follow up.

    Setting

    USA.

    Participants

    88 756 female registered nurses who were 30–55 years of age in 1976 (baseline). Exclusion criteria were cancer other than non-melanoma skin cancer before 1980, ulcerative colitis, familial polyposis syndrome, implausible high or low scores for total energy intake, missing data on food frequency questionnaires between 1980 and 1992, or incomplete information on aspirin or multivitamin use in 1980.

    Assessment of risk factors

    Nurses completed postal questionnaires at baseline and every 2 years thereafter. Food frequency questionnaires included information on 61 foods and beverages, vitamin and mineral supplements, and brands …

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    Footnotes

    • Source of funding: in part, National Institutes of Health.

    • For correspondence: Dr E Giovannucci, Channing Laboratory, 181 Longwood Avenue, Boston, MA 02115, USA. Fax +1 617 432 2435.

    • A modified version of this abstract appears in ACP Journal Club.