Evidence map›Paper›PMID 32317679›Full record

ArticleScientific reports2020

Impact of Hemoglobin Levels and Their Dynamic Changes on the Risk of Atrial Fibrillation: A Nationwide Population-Based Study.

Woo-Hyun Lim, Eue-Keun Choi, Kyung-Do Han, So-Ryoung Lee, Myung-Jin Cha, Seil Oh

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
3.4field-weighted citation impact, top 6% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Impact of anemia prior to catheter ablation for atrial fibrillation on clinical outcomes: a U.S. retrospective cohort analysis.Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing · 2026
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  7. Review
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  10. Observational
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  12. Atrial fibrillation in Retinal Artery Occlusions.Cardiology and cardiovascular medicine · 2025
    Article
  13. Interaction between anemia and renal dysfunction in relation to long-term survival following acute myocardial infarction.Clinical research in cardiology : official journal of the German Cardiac Society · 2024
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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 3 institutions in 1 country.

Woo-Hyun LimDivision of Cardiology, Department of Internal medicine, Seoul National University Boramae Medical Center, Seoul, Republic of Korea.
Eue-Keun ChoiDivision of Cardiology, Department of Internal medicine, Seoul National University Hospital, Seoul, Republic of Korea. choiek17@snu.ac.kr.
Kyung-Do HanDepartment of Biostatistics, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
So-Ryoung LeeDivision of Cardiology, Department of Internal medicine, Seoul National University Hospital, Seoul, Republic of Korea.
Myung-Jin ChaDivision of Cardiology, Department of Internal medicine, Seoul National University Hospital, Seoul, Republic of Korea.
Seil OhDivision of Cardiology, Department of Internal medicine, Seoul National University Hospital, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-2504-9615
Seoul National University Hospital · KRCatholic University of Korea · KRSeoul National University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Anemia is a risk factor for cardiovascular disease, but its impact on new-onset atrial fibrillation (AF) is unclear. In this study, we investigated the effect of hemoglobin (Hb) levels and their changes on the risk of AF development in the general population of Korea. We retrospectively analyzed a cohort from the Korean National Health Insurance Service database and identified 9,686,314 subjects (49.8% male) without a history of AF, aged ≥40 years, and with Hb levels available for both first (2009-2010) and second (2011-2012) health checkups. These subjects were followed up until 2017 to determine AF development. The presence of anemia (Hb level <13 g/dL in men and <12 g/dL in women) was a significant risk factor for AF development. However, Hb levels showed a U-shaped association with incident AF after adjustment for cardiovascular risk factors. AF incidence was lowest at Hb levels of 14-14.9 g/dL in men and 12-12.9 g/dL in women. Among individuals with Hb levels within normal ranges (13-15.9 g/dL in men and 12-14.9 g/dL in women), both decrease and increase in Hb levels at the second measurement outside the normal ranges showed an elevation of AF risk by 11% and 21% for men and 3% and 36% for women, respectively, compared with those who maintained normal Hb levels. In conclusion, low or high Hb levels are associated with an increased risk of incident AF. This study suggests that maintaining Hb levels within the normal ranges confers a low risk of AF development.

Indexed as

AdultAgedAnemiaAtrial FibrillationCardiovascular DiseasesCohort StudiesFemaleHemoglobinsHumansMaleMiddle AgedRepublic of KoreaRetrospective StudiesRisk FactorsHemoglobins

Identifiers

PMID32317679
PMCPMC7174343
OpenAlexW3017342315

What OpenQuestion holds

Textmetadata
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.