Evidence map›Paper›PMID 26987270›Full record

Observational studyThe British journal of nutrition2016

Vegetarian dietary patterns and the risk of breast cancer in a low-risk population.

Jason A Penniecook-Sawyers, Karen Jaceldo-Siegl, Jing Fan, Larry Beeson, Synnove Knutsen, Patti Herring, Gary E Fraser

Abstract readObservational Study
In one paragraph

Observational study in The British journal of nutrition, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 4 pooled it
–field-weighted citation impact
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

31 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
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  5. Review
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  9. Mammalian Species-Specific Resistance to Mammary Cancer.Journal of mammary gland biology and neoplasia · 2025
    Review
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  17. Observational
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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

7 authors.

Jason A Penniecook-SawyersAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.
Karen Jaceldo-SieglAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.
Jing FanAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.
Larry BeesonAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.
Synnove KnutsenAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.
Patti HerringAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.
Gary E FraserAdventist Health Study-2,Loma Linda University,Loma Linda,CA 92350,USA.

Funding

CANCER EPIDEMIOLOGY IN ADVENTISTS--A LOW RISK GROUPR01CA094594 · NCI · LOMA LINDA UNIVERSITY · PI FRASER, GARY E. · 2001 to 2008
$18.0M
Plant-based diets and risk of cancerU01CA152939 · NCI · LOMA LINDA UNIVERSITY · PI FRASER, GARY E. · 2011 to 2015
$5.7M
NCI NIH HHS 5U01CA152939NCI NIH HHS HHSN261201300071CNCI NIH HHS R01 CA094594NCI NIH HHS U01 CA152939
6 · The paper itself

Abstract

Among cancers in American women, breast cancer (BC) has the second highest incidence and mortality. The association of BC with diet has been inconsistent. Studies that evaluate associations with dietary patterns are less common and reflect an individual's whole diet. We associated dietary patterns with the risk of BC in American women of the Adventist Health Study-2 (AHS-2), a prospective cohort of 96 001 subjects recruited between 2002 and 2007. Answers to a previously validated FFQ were used to classify subjects to vegan, lacto-ovo-vegetarian, pesco-vegetarian, semi-vegetarian and non-vegetarian dietary patterns. Incident BC were identified by matching AHS-2 subjects to data from forty-eight state cancer registries. Statistical analyses used proportional hazard regression analyses with covariates that were chosen a priori. From 50 404 female participants (26 193 vegetarians), we identified 892 incident BC cases, with 478 cases among vegetarians. As compared with non-vegetarians, all vegetarians combined did not have a significantly lower risk (hazard ratio (HR) 0·97; CI 0·84, 1·11; P=0·64). However, vegans showed consistently lower (but non-significant) point estimates when compared with non-vegetarians (all cases: HR 0·78; CI 0·58, 1·05; P=0·09). In summary, participants in this cohort who follow a vegetarian dietary pattern did not experience a lower risk of BC as compared with non-vegetarians, although lower risk in vegans is possible. These findings add to the very limited literature associating vegetarian diets with BC risk and can assist nutritionists when evaluating the impact of these diets. The findings will also motivate further evaluation of vegan diets and their special characteristics.

Indexed as

Diet, VegetarianVegetariansAdultAgedAged, 80 and overBody Mass IndexBreast NeoplasmsFemaleFollow-Up StudiesHumansIncidenceLife StyleMiddle AgedNutrition AssessmentProportional Hazards ModelsProspective StudiesAdventistsAHS-2 Adventist Health Study-2BC breast cancerBreast cancerDietary patternsER oestrogen receptorHR hazard ratioPR progesterone receptorVegetarians

Identifiers

PMID26987270
PMCPMC4907539

What OpenQuestion holds

Textmetadata
LicenceTDM
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.