In:
Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 18, No. 2 ( 2009-02-01), p. 516-525
Abstract:
Background: ω-6 and ω-3 polyunsaturated fatty acids intakes may play opposing roles in inflammation-driven colorectal carcinogenesis. We examined the relationship of these polyunsaturated fatty acids and the ratio of their intake with colorectal cancer risk in a large U.S. prospective cohort. Design: Participants in the Cancer Prevention Study-II Nutrition Cohort completed a detailed questionnaire on diet, medical history, and lifestyle in 1999. Between 1999 and 2005, 869 incident colorectal cancer cases (452 men and 417 women) were identified among 99,080 participants (43,108 men and 55,972 women). Multivariate-adjusted rate ratios were calculated using Cox proportional hazards models. Results: The ratio of total ω-6 to total ω-3 intake was not associated with colorectal cancer risk in either sex. Contrary to our initial hypothesis, total ω-6 intake was inversely related to colorectal cancer risk in men [multivariate relative risk (95% confidence interval) for highest to lowest quartile, 0.81 (0.61-1.07); Ptrend = 0.07], and α-linolenic acid, the primary contributor to total ω-3 intake, was associated with increased risk in women for quartiles 2 through 4 versus the lowest quartile [relative risk (95% confidence interval), 1.50 (1.12-2.01), 1.40 (1.04-1.87), and 1.38 (1.02-1.85), respectively; Ptrend = 0.13] . In women, total ω-6 and marine ω-3 intake appeared to be associated with higher and lower risk, respectively, but associations were attenuated with adjustment for other risk factors. Conclusions: The ratio of ω-6 to ω-3 intake was not related to colorectal cancer risk in this cohort, which may be due to unexpected findings for the individual components. Differential associations by sex warrant further investigation. (Cancer Epidemiol Biomarkers Prev 2009;18(2):516–25)
Type of Medium:
Online Resource
ISSN:
1055-9965
,
1538-7755
DOI:
10.1158/1055-9965.EPI-08-0750
Language:
English
Publisher:
American Association for Cancer Research (AACR)
Publication Date:
2009
detail.hit.zdb_id:
2036781-8
detail.hit.zdb_id:
1153420-5
