Evidence map›Paper›PMID 32215702›Full record

ArticleClinical research in cardiology : official journal of the German Cardiac Society2020

Iron deficiency is a common disorder in general population and independently predicts all-cause mortality: results from the Gutenberg Health Study.

Benedikt Schrage, Nicole Rübsamen, Andreas Schulz, Thomas Münzel, Norbert Pfeiffer, Philipp S Wild, Manfred Beutel, Irene Schmidtmann, Rosemarie Lott, Stefan Blankenberg and 3 more

Open access · hybridAbstract read
In one paragraph

Article in Clinical research in cardiology : official journal of the German Cardiac Society, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.0field-weighted citation impact, top 7% 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

33 citing papers in PubMed, 48 citations in OpenAlex.

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  12. CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2025
    Review
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  14. Diagnosis and management of iron deficiency in females.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2025
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  20. Association between CFTR modulators and changes in iron deficiency markers in cystic fibrosis.Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2024
    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

13 authors at 3 institutions in 1 country.

Benedikt SchrageDepartment of General and Interventional Cardiology, University Heart and Vascular Center Hamburg, Hamburg, Germany.ORCID http://orcid.org/0000-0001-9041-3922
Nicole RübsamenDepartment of General and Interventional Cardiology, University Heart and Vascular Center Hamburg, Hamburg, Germany.
Andreas SchulzCentre of Medicine II (Statistics), University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
Thomas MünzelDZHK (German Center for Cardiovascular Research), Partner Site Rhine-Main, Mainz, Germany.
Norbert PfeifferDepartment for Opthalmology, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
Philipp S WildDZHK (German Center for Cardiovascular Research), Partner Site Rhine-Main, Mainz, Germany.
Manfred BeutelDepartment of Psychosomatic Medicine and Psychotherapy, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
Irene SchmidtmannInstitute for Medical Biometry, Epidemiology and Informatics, University Medical Center Mainz, Mainz, Germany.
Rosemarie LottInstitute for Clinical Chemistry and Laboratory Medicine, University Medical Center Mainz, Mainz, Germany.
Stefan BlankenbergDepartment of General and Interventional Cardiology, University Heart and Vascular Center Hamburg, Hamburg, Germany.
Tanja ZellerDepartment of General and Interventional Cardiology, University Heart and Vascular Center Hamburg, Hamburg, Germany.
Karl J LacknerDZHK (German Center for Cardiovascular Research), Partner Site Rhine-Main, Mainz, Germany.
Mahir KarakasDepartment of General and Interventional Cardiology, University Heart and Vascular Center Hamburg, Hamburg, Germany. m.karakas@uke.de.
Johannes Gutenberg University Mainz · DEGerman Centre for Cardiovascular Research · DEMSH Medical School Hamburg – University of Applied Sciences and Medical University · DE

Funding

Stiftung Rheinland-Pfalz für Innovation AZ 961-386261/733
6 · The paper itself

Abstract

backgroundIron deficiency is now accepted as an independent entity beyond anemia. Recently, a new functional definition of iron deficiency was proposed and proved strong efficacy in randomized cardiovascular clinical trials of intravenous iron supplementation. Here, we characterize the impact of iron deficiency on all-cause mortality in the non-anemic general population based on two distinct definitions.

methodsThe Gutenberg Health Study is a population-based, prospective, single-center cohort study. The 5000 individuals between 35 and 74 years underwent baseline and a planned follow-up visit at year 5. Tested definitions of iron deficiency were (1) functional iron deficiency-ferritin levels below 100 µg/l, or ferritin levels between 100 and 299 µg/l and transferrin saturation below 20%, and (2) absolute iron deficiency-ferritin below 30 µg/l.

resultsAt baseline, a total of 54.5% of participants showed functional iron deficiency at a mean hemoglobin of 14.3 g/dl; while, the rate of absolute iron deficiency was 11.8%, at a mean hemoglobin level of 13.4 g/dl. At year 5, proportion of newly diagnosed subjects was 18.5% and 4.8%, respectively. Rate of all-cause mortality was 7.2% (n = 361); while, median follow-up was 10.1 years. After adjustment for hemoglobin and major cardiovascular risk factors, the hazard ratio with 95% confidence interval of the association of iron deficiency with mortality was 1.3 (1.0-1.6; p = 0.023) for the functional definition, and 1.9 (1.3-2.8; p = 0.002) for absolute iron deficiency.

conclusionsIron deficiency is very common in the apparently healthy general population and independently associated with all-cause mortality in the mid to long term.

Indexed as

RegistriesAdultAgedAnemia, Iron-DeficiencyBiomarkersCause of DeathFemaleGermanyHemoglobinsHumansMaleMiddle AgedPrevalencePrognosisProspective StudiesSurvival RateBiomarkersHemoglobinsGeneral populationIron deficiencyRisk factor

Identifiers

PMID32215702
PMCPMC7588396
OpenAlexW3013802100

What OpenQuestion holds

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LicenceCC BY
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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.