Trial reportThe European respiratory journal2024
Oral nitrate supplementation improves cardiovascular risk markers in COPD: ON-BC, a randomised controlled trial.
Trial report in The European respiratory journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 3 of them syntheses that pooled 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.
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.
Who cites it
8 citing papers in PubMed, 3 syntheses or guidelines pooled it, 19 citations in OpenAlex.
- The effects of various nutritional supplements in patients with chronic obstructive pulmonary disease: a network meta-analysis.BMC pulmonary medicine · 2025Pooled it
- Plasma nitrate, dietary nitrate, blood pressure, and vascular health biomarkers: a GRADE-Assessed systematic review and dose-response meta-analysis of randomized controlled trials.Nutrition journal · 2025Pooled it
- Comparative Efficacy of Nutritional Supplements in Modulating Lung Function and Exercise Capacity in COPD Patients: A Network Meta-Analysis.International journal of chronic obstructive pulmonary disease · 2025Pooled it
- DASH Diet, Dietary Nitrate, and Nitric Oxide Bioavailability: Implications for Endothelial Dysfunction and Hypertension in Older Adults.Molecular nutrition & food research · 2026Review
- A study of the correlation between urinary perchlorate, nitrate, thiocyanate, and serum liver function indices.Scientific reports · 2025Article
- NO/NOS system dysregulation as a key molecular mechanism in chemotherapy-induced cardiotoxicity: a review.Frontiers in cardiovascular medicine · 2025Review
- The Association between Food Groups, Nutraceuticals, and Food Supplements Consumption on Vascular Health Outcomes: A Literature Review.Life (Basel, Switzerland) · 2024Review
- Interventions for the management of concomitant COPD and hypertension: A systematic review.Journal of multimorbidity and comorbidityReview
Corrections and comments
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Authors and funding
12 authors at 6 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundShort-term studies suggest that dietary nitrate (NO
methodsThe ON-BC trial was a randomised, double-blind, placebo-controlled parallel group study in stable COPD patients with home systolic BP (SBP) measurement ≥130 mmHg. Participants were randomly allocated (1:1) using computer-generated, block randomisation to either 70 mL NR-BRJ (400 mg NO
resultsCompared with placebo, active treatment lowered SBP (Hodges-Lehmann treatment effect -4.5 (95% CI -5.9- -3.0) mmHg), and improved 6MWD (30.0 (95% CI 15.7-44.2) m; p<0.001), RHI (0.34 (95% CI 0.03-0.63); p=0.03) and AIx75 (-7.61% (95% CI -14.3- -0.95%); p=0.026).
conclusionsIn people with COPD, prolonged dietary nitrate supplementation in the form of beetroot juice produces a sustained reduction in BP, associated with an improvement in endothelial function and exercise capacity.
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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 Socratic graph.