Evidence map›Paper›PMID 23333369›Full record

Trial reportInternational journal of cardiology2013

Risk factors for incident atrial fibrillation with and without left atrial enlargement in women.

David Conen, Robert J Glynn, Roopinder K Sandhu, Usha B Tedrow, Christine M Albert

Open access · greenAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in International journal of cardiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 2 pooled it
2.4field-weighted citation impact, top 10% 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

18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 36 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Brazilian Atrial Fibrillation Guidelines - 2025.Arquivos brasileiros de cardiologia · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Stimulant Drugs of Abuse and Cardiac Arrhythmias.Circulation. Arrhythmia and electrophysiology · 2022
    Review
  10. Article
  11. Article
  12. Review
  13. Left Atrial Strain for Predicting Atrial Fibrillation Onset in Hypertensive Patients.High blood pressure & cardiovascular prevention : the official journal of the Italian Society of Hypertension · 2019
    Article
  14. Article
  15. Article
  16. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 3 countries.

David ConenCenter for Arrhythmia Prevention, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States; Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States; Department of Medicine, University Hospital, Basel, Switzerland, United States. Electronic address: conend@uhbs.ch.
Robert J Glynn
Roopinder K Sandhu
Usha B Tedrow
Christine M Albert
Harvard University · USBrigham and Women's Hospital · US

Funding

Women's Health Study: Continued Follow-upR01CA047988 · NCI · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E., LEE, I-MIN · 1991 to 2014
$28.2M
Women's Health Study: Continued Follow-UpR01HL080467 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E. · 2005 to 2010
$4.5M
TRIAL OF VITAMIN E, BETA-CAROTENE &ASPRIN IN WOMENR01HL043851 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E · 1991 to 2000
$1.6M
The Women's Health Study: Addition of New Data to Maximize its Research ImpactRC1HL099355 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E. · 2009 to 2010
$992k
Predisposing Factors for the Development of Atrial Fibrillation Among WomenR21HL093613 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI ALBERT, CHRISTINE M · 2009 to 2010
$347k
NCI NIH HHS CA-047988NCI NIH HHS R01 CA047988NHLBI NIH HHS HL-043851NHLBI NIH HHS HL-080467NHLBI NIH HHS HL-093613NHLBI NIH HHS HL-099355NHLBI NIH HHS R01 HL043851NHLBI NIH HHS R01 HL080467NHLBI NIH HHS R21 HL093613NHLBI NIH HHS RC1 HL099355
6 · The paper itself

Abstract

backgroundLeft atrial (LA) enlargement facilitates induction and/or maintenance of atrial fibrillation (AF). However, little is known about risk factors for AF with normal LA size.

methodsWe prospectively followed 34713 initially healthy women for incident AF. Information on echocardiographic LA size at first AF diagnosis was abstracted from medical charts during AF confirmation. LA enlargement was defined as LA diameter >40 mm. Using a competing risk approach, we constructed Cox proportional-hazards models to calculate hazard ratios (HR) and 95% confidence intervals (CI) of risk factors for incident AF with and without LA enlargement, respectively.

resultsAmong 796 women with incident AF and available LA size, 328 (41%) had LA enlargement. In multivariable competing risk models, the relationship between age and incident AF was stronger in those with (HR 1.12, 95% CI 1.10-1.14) versus without (HR 1.08, 95% CI 1.06-1.09) LA enlargement (p for difference <0.0001). Body weight was associated with AF only in the presence of LA enlargement (HR per 10 kg 1.34, 95% CI 1.26-1.43; versus 1.07, 95% CI 0.998-1.14, p for difference<0.0001). Hypertension and height were significantly associated with AF both in the presence (HR 1.99, 95% CI 1.49-2.65; and HR per 10 cm 1.36, 95% CI 1.13-1.63) and absence (1.55, 1.25-1.92 and 1.29, 1.10-1.50) of LA enlargement (p for difference 0.17 and 0.66, respectively).

conclusionsThese data suggest that LA enlargement explains much of the increased AF risk associated with obesity and age. In contrast, height and hypertension appear to also influence AF risk through other mechanisms besides LA enlargement.

Indexed as

AgedAtrial FibrillationDouble-Blind MethodEchocardiographyFemaleFollow-Up StudiesForecastingHeart AtriaHumansHypertensionIncidenceMiddle AgedObesityProspective StudiesRisk FactorsUnited StatesAtrial fibrillationHypertensionLeft atriumObesityWomen

Identifiers

PMID23333369
PMCPMC3643987
OpenAlexW1998183255

What OpenQuestion holds

Textmetadata
LicenceTDM
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.