Evidence map›Paper›PMID 37547514›Full record

ArticleKidney international reports2023

A Randomized Trial of Intravenous Iron Supplementation and Exercise on Exercise Capacity in Iron-Deficient Nonanemic Patients With CKD.

Sharlene A Greenwood, Benjamin A Oliveira, Elham Asgari, Salma Ayis, Luke A Baker, Nicholas Beckley-Hoelscher, Aicha Goubar, Debasish Banerjee, Sunil Bhandari, Joseph Chilcot and 16 more

Abstract read
In one paragraph

Article in Kidney international reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Guideline
  2. Article
  3. KDIGO 2026 Clinical Practice Guideline for Anemia in Chronic Kidney Disease (CKD): a commentary from the European Renal Best Practice (ERBP).Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2026
    Article
  4. Article
  5. Article
  6. Iron Deficiency in Heart Failure: Cellular Mechanisms and Therapeutic Implications.Journal of cardiovascular development and disease · 2025
    Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
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

26 authors.

Sharlene A GreenwoodKing's College Hospital NHS Trust, London, UK.
Benjamin A OliveiraKing's College London, London, UK.
Elham AsgariGuy's and St Thomas' NHS Trust, London, UK.
Salma AyisKing's College London, London, UK.
Luke A BakerUniversity of Leicester, Leicester, UK.
Nicholas Beckley-HoelscherKing's College London, London, UK.
Aicha GoubarKing's College London, London, UK.
Debasish BanerjeeSt George's University Hospitals NHS Foundation Trust, London, UK.
Sunil BhandariHull University Teaching Hospitals NHS Trust, UK.
Joseph ChilcotKing's College London, London, UK.
James O BurtonUniversity of Leicester, Leicester, UK.
Philip A KalraSalford Royal Hospital, Northern Care Alliance NHS Foundation Trust, Salford, UK.
Courtney J LightfootUniversity of Leicester, Leicester, UK.
Iain C MacdougallKing's College Hospital NHS Trust, London, UK.
Kieran McCaffertyBarts Hospitals NHS Trust, London, UK.
Thomas H MercerQueen Margaret University, Edinburgh, UK.
Darlington O OkonkoKing's College London, London, UK.
Chante ReidKing's College Hospital NHS Trust, London, UK.
Fiona ReidKing's College London, London, UK.
Alice C SmithUniversity of Leicester, Leicester, UK.
Pauline A SwiftEpsom and St Helier University Hospitals NHS Trust, London, UK.
Anastasios MangelisKing's College London, London, UK.
Emma WatsonUniversity of Leicester, Leicester, UK.
David C WheelerUniversity College London, London, UK.
Thomas J WilkinsonUniversity of Leicester, Leicester, UK.
Kate BramhamKing's College Hospital NHS Trust, London, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Introduction: Patients with chronic kidney disease (CKD) are often iron deficient, even when not anemic. This trial evaluated whether iron supplementation enhances exercise capacity of nonanemic patients with CKD who have iron-deficiency. Methods: Prospective, multicenter double-blind randomized controlled trial of nondialysis patients with CKD and iron-deficiency but without anemia (Hemoglobin [Hb] >110 g/l). Patients were assigned 1:1 to intravenous (IV) iron therapy, or placebo. An 8-week exercise program commenced at week 4. The primary outcome was the mean between-group difference in 6-minute walk test (6MWT) at 4 weeks. Secondary outcomes included 6MWT at 12 weeks, transferrin saturation (TSAT), serum ferritin (SF), Hb, renal function, muscle strength, functional capacity, quality of life, and adverse events at baseline, 4 weeks, and at 12 weeks. Mean between-group differences were analyzed using analysis of covariance models. Results: Among 75 randomized patients, mean (SD) age for iron therapy ( Conclusion: This trial did not demonstrate beneficial effects of IV iron therapy on exercise capacity at 4 weeks. A larger study is needed to confirm if IV iron is beneficial in nondialysis patients with CKD who are iron-deficient.

Indexed as

chronic kidney diseaseexercisefatigueIronmuscle metabolismphysical activity

Identifiers

PMID37547514
PMCPMC10403653

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Registered trials

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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.