Evidence map›Paper›PMID 28319109›Full record

Trial reportNutrition & diabetes2017

The BROAD study: A randomised controlled trial using a whole food plant-based diet in the community for obesity, ischaemic heart disease or diabetes.

N Wright, L Wilson, M Smith, B Duncan, P McHugh

Registry-linked trialAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Nutrition & diabetes, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05889715 (An Interprofessional-led Model of Care to Prevent and Treat Chronic Diseases Using a Whole Food, Plant-based Nutrition Program in a Primary Care Setting), which is not on this map. Cited by 145 papers, 15 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
145citing papers in PubMed, 15 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.

NCT05889715 nacompletednot on this mapstarted 2023, after this paper: background citation

An Interprofessional-led Model of Care to Prevent and Treat Chronic Diseases Using a Whole Food, Plant-based Nutrition Program in a Primary Care Setting

TypeinterventionalSponsorThe University of Texas Health Science Center at San AntonioRan2023 to 2024Enrolled47ConditionsChronic Disease, Nutrition, HealthyArmsGreen Wellness Program: Plants-2-Plate
3 · Its place in the literature

Who cites it

145 citing papers in PubMed, 15 syntheses or guidelines pooled it.

  1. Pooled it
  2. Plant-based and sustainable diet: A systematic review of its impact on obesity.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025
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  10. Effects of vegan diets on cardiometabolic health: A systematic review and meta-analysis of randomized controlled trials.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2022
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  13. Long-term effects of weight-reducing diets in people with hypertension.The Cochrane database of systematic reviews · 2021
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85 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

5 authors.

N WrightRoyal New Zealand College of General Practitioners, Gisborne, New Zealand.ORCID 0000-0002-2829-3365
L WilsonTwo Zesty Bananas Limited, Wellington, New Zealand.
M SmithBROAD Study, Gisborne, New Zealand.
B DuncanHauora Tairāwhiti, Gisborne, New Zealand.
P McHughDepartment Primary Health Care and General Practice, University of Otago, Wellington, New Zealand.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND/

objectiveThere is little randomised evidence using a whole food plant-based (WFPB) diet as intervention for elevated body mass index (BMI) or dyslipidaemia. We investigated the effectiveness of a community-based dietary programme. Primary end points: BMI and cholesterol at 6 months (subsequently extended). SUBJECTS: Ages 35-70, from one general practice in Gisborne, New Zealand. Diagnosed with obesity or overweight and at least one of type 2 diabetes, ischaemic heart disease, hypertension or hypercholesterolaemia. Of 65 subjects randomised (control n=32, intervention n=33), 49 (75.4%) completed the study to 6 months. Twenty-three (70%) intervention participants were followed up at 12 months.

methodsAll participants received normal care. Intervention participants attended facilitated meetings twice-weekly for 12 weeks, and followed a non-energy-restricted WFPB diet with vitamin B

resultsAt 6 months, mean BMI reduction was greater with the WFPB diet compared with normal care (4.4 vs 0.4, difference: 3.9 kg m

conclusionsThis programme led to significant improvements in BMI, cholesterol and other risk factors. To the best of our knowledge, this research has achieved greater weight loss at 6 and 12 months than any other trial that does not limit energy intake or mandate regular exercise.

Indexed as

Diet, VegetarianAdultAgedBody Mass IndexCholesterolDiabetes Mellitus, Type 2FemaleHumansHypercholesterolemiaHypertensionMaleMiddle AgedMyocardial IschemiaObesityOverweightRisk FactorsCholesterol

Identifiers

PMID28319109
PMCPMC5380896

What OpenQuestion holds

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Registered trials

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.