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Dietary fiber and whole-grain consumption in relation to colorectal cancer in the NIH-AARP Diet and Health Study.
Am J Clin Nutr 2007; 85(5):1353-60AJ

Abstract

BACKGROUND

Whether the intake of dietary fiber can protect against colorectal cancer is a long-standing question of considerable public health import, but the epidemiologic evidence has been inconsistent.

OBJECTIVE

The objective was to investigate the relation between dietary fiber and whole-grain food intakes and invasive colorectal cancer in the prospective National Institutes of Health-AARP Diet and Health Study.

DESIGN

The analytic cohort consisted of 291 988 men and 197 623 women aged 50-71 y. Diet was assessed with a self-administered food-frequency questionnaire at baseline in 1995-1996; 2974 incident colorectal cancer cases were identified during 5 y of follow-up. The Cox proportional hazards model was used to estimate the relative risks (RRs) and 95% CIs.

RESULTS

Total dietary fiber intake was not associated with colorectal cancer. The multivariate RR for the highest compared with the lowest intake quintile (RR(Q5-Q1)) was 0.99 (95% CI: 0.85, 1.15; P for trend = 0.96). In analyses of fiber from different food sources, only fiber from grains was associated with a lower risk of colorectal cancer (multivariate RR(Q5-Q1): 0.86; 95% CI: 0.76, 0.98; P for trend = 0.01). Whole-grain intake was inversely associated with colorectal cancer risk: the multivariate RR(Q5-Q1) was 0.79 (95% CI: 0.70, 0.89) for the whole cohort (P for trend < 0.001). The association with whole grain was stronger for rectal than for colon cancer.

CONCLUSIONS

In this large prospective cohort study, total dietary fiber intake was not associated with colorectal cancer risk, whereas whole-grain consumption was associated with a modest reduced risk.

Authors+Show Affiliations

Division of Cancer Epidemiology, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA. schatzka@mail.nih.govNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Intramural

Language

eng

PubMed ID

17490973

Citation

Schatzkin, Arthur, et al. "Dietary Fiber and Whole-grain Consumption in Relation to Colorectal Cancer in the NIH-AARP Diet and Health Study." The American Journal of Clinical Nutrition, vol. 85, no. 5, 2007, pp. 1353-60.
Schatzkin A, Mouw T, Park Y, et al. Dietary fiber and whole-grain consumption in relation to colorectal cancer in the NIH-AARP Diet and Health Study. Am J Clin Nutr. 2007;85(5):1353-60.
Schatzkin, A., Mouw, T., Park, Y., Subar, A. F., Kipnis, V., Hollenbeck, A., ... Thompson, F. E. (2007). Dietary fiber and whole-grain consumption in relation to colorectal cancer in the NIH-AARP Diet and Health Study. The American Journal of Clinical Nutrition, 85(5), pp. 1353-60.
Schatzkin A, et al. Dietary Fiber and Whole-grain Consumption in Relation to Colorectal Cancer in the NIH-AARP Diet and Health Study. Am J Clin Nutr. 2007;85(5):1353-60. PubMed PMID: 17490973.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary fiber and whole-grain consumption in relation to colorectal cancer in the NIH-AARP Diet and Health Study. AU - Schatzkin,Arthur, AU - Mouw,Traci, AU - Park,Yikyung, AU - Subar,Amy F, AU - Kipnis,Victor, AU - Hollenbeck,Albert, AU - Leitzmann,Michael F, AU - Thompson,Frances E, PY - 2007/5/11/pubmed PY - 2007/6/15/medline PY - 2007/5/11/entrez SP - 1353 EP - 60 JF - The American journal of clinical nutrition JO - Am. J. Clin. Nutr. VL - 85 IS - 5 N2 - BACKGROUND: Whether the intake of dietary fiber can protect against colorectal cancer is a long-standing question of considerable public health import, but the epidemiologic evidence has been inconsistent. OBJECTIVE: The objective was to investigate the relation between dietary fiber and whole-grain food intakes and invasive colorectal cancer in the prospective National Institutes of Health-AARP Diet and Health Study. DESIGN: The analytic cohort consisted of 291 988 men and 197 623 women aged 50-71 y. Diet was assessed with a self-administered food-frequency questionnaire at baseline in 1995-1996; 2974 incident colorectal cancer cases were identified during 5 y of follow-up. The Cox proportional hazards model was used to estimate the relative risks (RRs) and 95% CIs. RESULTS: Total dietary fiber intake was not associated with colorectal cancer. The multivariate RR for the highest compared with the lowest intake quintile (RR(Q5-Q1)) was 0.99 (95% CI: 0.85, 1.15; P for trend = 0.96). In analyses of fiber from different food sources, only fiber from grains was associated with a lower risk of colorectal cancer (multivariate RR(Q5-Q1): 0.86; 95% CI: 0.76, 0.98; P for trend = 0.01). Whole-grain intake was inversely associated with colorectal cancer risk: the multivariate RR(Q5-Q1) was 0.79 (95% CI: 0.70, 0.89) for the whole cohort (P for trend < 0.001). The association with whole grain was stronger for rectal than for colon cancer. CONCLUSIONS: In this large prospective cohort study, total dietary fiber intake was not associated with colorectal cancer risk, whereas whole-grain consumption was associated with a modest reduced risk. SN - 0002-9165 UR - https://www.unboundmedicine.com/medline/citation/17490973/Dietary_fiber_and_whole_grain_consumption_in_relation_to_colorectal_cancer_in_the_NIH_AARP_Diet_and_Health_Study_ L2 - https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/85.5.1353 DB - PRIME DP - Unbound Medicine ER -