Evidence map›Paper›PMID 32619213›Full record

ArticleThe American journal of clinical nutrition2020

Whole grain and dietary fiber intake and risk of colorectal cancer in the NIH-AARP Diet and Health Study cohort.

Autumn G Hullings, Rashmi Sinha, Linda M Liao, Neal D Freedman, Barry I Graubard, Erikka Loftfield

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of clinical nutrition, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 2 pooled it
7.0field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

65 citing papers in PubMed, 2 syntheses or guidelines pooled it, 105 citations in OpenAlex.

  1. Pooled it
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  7. Whole Grains Perspective: Porridge or Popcorn.The Journal of nutrition · 2026
    Review
  8. TGF-β Pathway-Based Polygenic Risk Score Modifies the Association between Red Meat Intake and Colorectal Cancer Risk: Application of a Novel Pathway-Based PRS Method.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2026
    Article
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  17. Associations Between Prescreening Dietary Patterns and Longitudinal Colonoscopy Outcomes in Veterans.Federal practitioner : for the health care professionals of the VA, DoD, and PHS · 2025
    Article
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5 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Autumn G HullingsDivision of Cancer Epidemiology & Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
Rashmi SinhaDivision of Cancer Epidemiology & Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
Linda M LiaoDivision of Cancer Epidemiology & Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
Neal D FreedmanDivision of Cancer Epidemiology & Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
Barry I GraubardDivision of Cancer Epidemiology & Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
Erikka LoftfieldDivision of Cancer Epidemiology & Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
National Cancer Institute · US

Funding

Prospective Studies of Diet and Cancer in the AARP CohortZIACP010196 · NCI · DIVISION OF CANCER EPIDEMIOLOGY AND GENETICS · PI SINHA, RASHMI · 2009 to 2025
$21.0M
6 · The paper itself

Abstract

backgroundWhole grains and other foods containing fiber are thought to be inversely related to colorectal cancer (CRC). However, whether these associations reflect fiber or fiber source remains unclear.

objectivesWe evaluated associations of whole grain and dietary fiber intake with CRC risk in the large NIH-AARP Diet and Health Study.

methodsWe used Cox proportional hazard models to estimate HRs and 95% CIs for whole grain and dietary fiber intake and risk of CRC among 478,994 US adults, aged 50-71 y. Diet was assessed using a self-administered FFQ at baseline in 1995-1996, and 10,200 incident CRC cases occurred over 16 y and 6,464,527 person-years of follow-up. We used 24-h dietary recall data, collected on a subset of participants, to evaluate the impact of measurement error on risk estimates.

resultsAfter multivariable adjustment for potential confounders, including folate, we observed an inverse association for intake of whole grains (HRQ5 vs.Q1 : 0.84; 95% CI: 0.79, 0.90; P-trend < 0.001), but not dietary fiber (HRQ5 vs. Q1: 0.96; 95% CI: 0.88, 1.04; P-trend = 0.40), with CRC incidence. Intake of whole grains was inversely associated with all CRC cancer subsites, particularly rectal cancer (HRQ5 vs. Q1: 0.76; 95% CI: 0.67, 0.87; P-trend < 0.001). Fiber from grains, but not other sources, was associated with lower incidence of CRC (HRQ5 vs. Q1: 0.89; 95% CI: 0.83, 0.96; P-trend < 0.001), particularly distal colon (HRQ5 vs. Q1: 0.84; 95% CI: 0.73, 0.96; P-trend = 0.005) and rectal cancer (HRQ5 vs. Q1: 0.77; 95% CI: 0.66, 0.88; P-trend < 0.001).

conclusionsDietary guidance for CRC prevention should focus on intake of whole grains as a source of fiber.

Indexed as

DietWhole GrainsAgedCohort StudiesColorectal NeoplasmsDietary FiberFeeding BehaviorFemaleHumansMaleMiddle AgedDietary Fibercolon cancercolorectal cancerdietdietary fiberepidemiologyrectal cancerwhole grains

Identifiers

PMID32619213
PMCPMC7458778
OpenAlexW3038971718

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.