Evidence map›Paper›PMID 28670117›Full record

Trial reportInternational journal of chronic obstructive pulmonary disease2017

Dietary beetroot juice - effects on physical performance in COPD patients: a randomized controlled crossover trial.

Anne Louise Friis, Carina Bjørnskov Steenholt, Anders Løkke, Mette Hansen

Open access · goldAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in International journal of chronic obstructive pulmonary disease, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 6 pooled it
3.0field-weighted citation impact, top 10% 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

17 citing papers in PubMed, 6 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
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  5. Pooled it
  6. Pooled it
  7. Effect of pre-exercise dietary nitrate on skeletal muscle blood flow in a rat model of pulmonary hypertension.American journal of physiology. Regulatory, integrative and comparative physiology · 2025
    Article
  8. Review
  9. Dietary Beetroot Juice - Effects in Patients with COPD: A Review.International journal of chronic obstructive pulmonary disease · 2024
    Review
  10. Review
  11. Article
  12. Review
  13. Article
  14. Review
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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

4 authors at 1 institution in 1 country.

Anne Louise FriisSection for Sport Science, Department of Public Health, Aarhus University, Denmark.
Carina Bjørnskov SteenholtSection for Sport Science, Department of Public Health, Aarhus University, Denmark.
Anders LøkkeDepartment of Clinical Medicine, Aarhus University, Denmark.
Mette HansenSection for Sport Science, Department of Public Health, Aarhus University, Denmark.
Aarhus University · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectiveDietary beetroot juice (BR) supplementation has been shown to reduce the oxygen (O

methodsFifteen COPD patients consumed concentrated BR (2×70 mL twice daily, each containing 300 mg nitrate) or placebo (PL) (2×70 mL twice daily, nitrate-negligible) in a randomized order for 6 consecutive days. On day 7, participants consumed either BR or PL 150 min before testing. BP was measured before completing 6-minute walk test (6MWT) and two trials of submaximal cycling. The protocol was repeated after a minimum washout of 7 days.

resultsPlasma nitrite concentration was higher in the BR condition compared to PL (

conclusionSeven days of BR ingestion increased plasma nitrite concentrations and lowered DBP in COPD patients. However, BR did not increase functional walking capacity, O

Indexed as

Beta vulgarisDietary SupplementsExercise ToleranceFruit and Vegetable JuicesPlant RootsAgedBicyclingBiomarkersBlood PressureCross-Over StudiesDenmarkDouble-Blind MethodFemaleHumansLungMaleBiomarkersNitritesbeetroot juiceblood pressurechronic obstructive pulmonary diseaseexercisenitratenitric oxidenitrite

Identifiers

PMID28670117
PMCPMC5479267
OpenAlexW2626271594

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.