Evidence map›Paper›PMID 25559015›Full record

Observational studyJournal of the American Heart Association2015

Association of fluid retention with anemia and clinical outcomes among patients with chronic kidney disease.

Szu-Chun Hung, Ko-Lin Kuo, Ching-Hsiu Peng, Che-Hsiung Wu, Yi-Chun Wang, Der-Cherng Tarng

Open access · goldAbstract readComparative StudyObservational Study
In one paragraph

Observational study in Journal of the American Heart Association, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

36 citing papers in PubMed, 54 citations in OpenAlex.

  1. Article
  2. Article
  3. Impacts of Ambient Temperatures on Pediatric Anemia in Sub-Saharan Africa: A Regional Ecological Study.International journal of environmental research and public health · 2025
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  19. Adverse Drug Reactions of Antihypertensives andFrontiers in pharmacology · 2022
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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

6 authors at 4 institutions in 1 country.

Szu-Chun HungDivision of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.) School of Medicine, Tzu Chi University, Hualien, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.).
Ko-Lin KuoDivision of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.) School of Medicine, Tzu Chi University, Hualien, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.).
Ching-Hsiu PengDivision of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.) School of Medicine, Tzu Chi University, Hualien, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.).
Che-Hsiung WuDivision of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.) School of Medicine, Tzu Chi University, Hualien, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.).
Yi-Chun WangDivision of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.) School of Medicine, Tzu Chi University, Hualien, Taiwan (S.C.H., K.L.K., C.H.P., C.H.W., Y.C.W.).
Der-Cherng TarngInstitutes of Physiology and Clinical Medicine, National Yang-Ming University, Taipei, Taiwan (D.C.T.) Division of Nephrology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan (D.C.T.).
National Taiwan University · TWNational Yang Ming Chiao Tung University · TWTaipei Tzu Chi Hospital · TWTzu Chi University · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundObservational studies have demonstrated an association between anemia and adverse outcomes in patients with chronic kidney disease (CKD). However, randomized trials failed to identify a benefit of higher hemoglobin concentrations, suggesting that the anemia-outcome association may be confounded by unknown factors. METHODS AND

resultsWe evaluated the influence of fluid status on hemoglobin concentrations and the cardiovascular and renal outcomes in a prospective cohort of 326 patients with stage 3 to 5 CKD. Fluid status, as defined by overhydration (OH) level measured with bioimpedance, was negatively correlated with hemoglobin concentrations at baseline (r=-0.438, P<0.001). In multivariate regression analysis, OH remained an independent predictor of hemoglobin, second only to estimated glomerular filtration rate. Patients were stratified into 3 groups: no anemia (n=105), true anemia (n=82), and anemia with excess OH (n=139) (relative OH level ≥7%, the 90th percentile for the healthy population). During a median follow-up of 2.2 years, there was no difference in cardiovascular and renal risks between patients with true anemia and those with no anemia in the adjusted Cox proportional hazards models. However, patients with anemia with excess OH had a significantly increased risk of cardiovascular morbidity and mortality and CKD progression relative to those with true anemia and those with no anemia, respectively.

conclusionsFluid retention is associated with the severity of anemia and adverse cardiovascular and renal outcomes in patients with CKD. Further research is warranted to clarify whether the correction of fluid retention, instead of increasing erythropoiesis, would improve outcomes of CKD-associated anemia.

Indexed as

AgedAged, 80 and overAge DistributionAnemiaCohort StudiesComorbidityFemaleFollow-Up StudiesGlomerular Filtration RateHemoglobinsHumansIncidenceKidney Failure, ChronicMaleMiddle AgedMultivariate AnalysisHemoglobinsanemiabioimpedancecardiovascularkidneyoverhydration

Identifiers

PMID25559015
PMCPMC4330071
OpenAlexW2112177272

What OpenQuestion holds

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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.