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Intakes of vitamins A, C, and E and use of multiple vitamin supplements and risk of colon cancer: a pooled analysis of prospective cohort studies
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2010 (English)In: Cancer Causes and Control, ISSN 0957-5243, E-ISSN 1573-7225, Vol. 21, no 11, 1745-1757 p.Article in journal (Refereed) Published
Abstract [en]

To evaluate the associations between intakes of vitamins A, C, and E and risk of colon cancer. Using the primary data from 13 cohort studies, we estimated study- and sex-specific relative risks (RR) with Cox proportional hazards models and subsequently pooled RRs using a random effects model. Among 676,141 men and women, 5,454 colon cancer cases were identified (7-20 years of follow-up across studies). Vitamin A, C, and E intakes from food only were not associated with colon cancer risk. For intakes from food and supplements (total), the pooled multivariate RRs (95% CI) were 0.88 (0.76-1.02, > 4,000 vs. a parts per thousand currency sign1,000 mu g/day) for vitamin A, 0.81 (0.71-0.92, > 600 vs. a parts per thousand currency sign100 mg/day) for vitamin C, and 0.78 (0.66-0.92, > 200 vs. a parts per thousand currency sign6 mg/day) for vitamin E. Adjustment for total folate intake attenuated these associations, but the inverse associations with vitamins C and E remained significant. Multivitamin use was significantly inversely associated with colon cancer risk (RR = 0.88, 95% CI: 0.81-0.96). Modest inverse associations with vitamin C and E intakes may be due to high correlations with folate intake, which had a similar inverse association with colon cancer. An inverse association with multivitamin use, a major source of folate and other vitamins, deserves further study.

Place, publisher, year, edition, pages
2010. Vol. 21, no 11, 1745-1757 p.
Keyword [en]
Vitamin A, Vitamin C, Vitamin E, Multivitamin, Colon cancer, Cohort study, Pooled analysis
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-147249DOI: 10.1007/s10552-010-9549-yISI: 000283359400001PubMedID: 20820901OAI: oai:DiVA.org:uu-147249DiVA: diva2:400268
Available from: 2011-02-25 Created: 2011-02-24 Last updated: 2011-02-25Bibliographically approved

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