Evidence map›Paper›PMID 33188534›Full record

SynthesisBritish journal of clinical pharmacology2021

Hypophosphataemia after treatment of iron deficiency with intravenous ferric carboxymaltose or iron isomaltoside-a systematic review and meta-analysis.

Benedikt Schaefer, Moritz Tobiasch, André Viveiros, Herbert Tilg, Nicholas A Kennedy, Myles Wolf, Heinz Zoller

Open access · bronzeAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in British journal of clinical pharmacology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed, 6 pooled it
7.7field-weighted citation impact, top 2% 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

69 citing papers in PubMed, 6 syntheses or guidelines pooled it, 129 citations in OpenAlex.

  1. Guideline
  2. Pooled it
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  4. Osteomalacia as a Complication of Intravenous Iron Infusion: A Systematic Review of Case Reports.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
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  12. Review
  13. Observational
  14. Article
  15. Effectiveness and safety of intravenous iron in ulcerative colitis: A real-world study of impact of disease activity and iron preparations.Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology · 2026
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9 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

7 authors at 4 institutions in 3 countries.

Benedikt SchaeferDepartment of Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0001-8690-2774
Moritz TobiaschDepartment of Medicine, University Teaching Hospital of Hall in Tirol, Hall, Austria.
André ViveirosDepartment of Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria.
Herbert TilgDepartment of Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria.
Nicholas A KennedyIBD Pharmacogenetics, University of Exeter, Exeter, UK.
Myles WolfDepartment of Medicine, Division of Nephrology, and Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC, USA.
Heinz ZollerDepartment of Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0003-1794-422X
Innsbruck Medical University · ATDuke University · USUMIT - Private Universität für Gesundheitswissenschaften, Medizinische Informatik und Technik · ATUniversity of Exeter · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsHypophosphataemia is an increasingly recognized side-effect of ferric carboxymaltose (FCM) and possibly iron isomaltoside/ferric derisomaltose (IIM), which are used to treat iron deficiency. The aim of this study was to determine frequency, severity, duration and risk factors of incident hypophosphataemia after treatment with FCM and IIM.

methodsA systematic literature search for articles indexed in EMBASE, PubMed and Web of Science in years 2005-2020 was carried out using the search terms 'ferric carboxymaltose' OR 'iron isomaltoside'. Prospective clinical trials reporting outcomes on hypophosphataemia rate, mean nadir serum phosphate and/or change in mean serum phosphate from baseline were selected. Hypophosphataemia rate and severity were compared for studies on IIM vs. FCM after stratification for chronic kidney disease. Meta-regression analysis was used to investigate risk factors for hypophosphataemia.

resultsAcross the 42 clinical trials included in the meta-analysis, FCM induced a significantly higher incidence of hypophosphataemia than IIM (47%, 95% CI 36-58% vs. 4%, 95% CI 2-5%), and significantly greater mean decreases in serum phosphate (0.40 vs. 0.06 mmol/L). Hypophosphataemia persisted at the end of the study periods (maximum 3 months) in up to 45% of patients treated with FCM. Meta-regression analysis identified low baseline serum ferritin and transferrin saturation, and normal kidney function as significant predictors of hypophosphataemia.

conclusionFCM is associated with a high risk of hypophosphataemia, which does not resolve for at least 3 months in a large proportion of affected patients. More severe iron deficiency and normal kidney function are risk factors for hypophosphataemia.

Indexed as

Anemia, Iron-DeficiencyHypophosphatemiaAdministration, IntravenousDisaccharidesFerric CompoundsFibroblast Growth Factor-23HumansMaltoseProspective StudiesDisaccharidesferric carboxymaltoseFerric CompoundsFGF23 protein, humanFibroblast Growth Factor-23iron isomaltoside 1000Maltoseanaemiaferric derisomaltoseFGF23phosphate

Identifiers

PMID33188534
PMCPMC8247006
OpenAlexW3100363034

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.