Evidence map›Paper›PMID 20959565›Full record

Trial reportCirculation. Cardiovascular quality and outcomes2010

Warfarin discontinuation after starting warfarin for atrial fibrillation.

Margaret C Fang, Alan S Go, Yuchiao Chang, Leila H Borowsky, Niela K Pomernacki, Natalia Udaltsova, Daniel E Singer

Open access · bronzeAbstract readClinical Trial
In one paragraph

Trial report in Circulation. Cardiovascular quality and outcomes, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed, 3 pooled it
8.0field-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

66 citing papers in PubMed, 3 syntheses or guidelines pooled it, 187 citations in OpenAlex.

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  20. Impact of Warfarin Persistence on Health-Care Utilization and Costs Among Patients With Atrial Fibrillation Managed in Anticoagulation Clinics in the United States.Clinical and applied thrombosis/hemostasis : official journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis · 2018
    Article

6 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 1 institution in 1 country.

Margaret C FangDepartment of Medicine, University of California, San Francisco, 94143, USA. mfang@medicine.ucsf.edu
Alan S Go
Yuchiao Chang
Leila H Borowsky
Niela K Pomernacki
Natalia Udaltsova
Daniel E Singer
Kaiser Permanente · US

Funding

HMO Research Network Cardiovascular Research NetworkU19HL091179 · NHLBI · KAISER FOUNDATION RESEARCH INSTITUTE · PI GO, ALAN S · 2007 to 2011
$8.7M
Contemporary Treatment and Outcomes for Atrial Fibrillation in Clinical PracticeRC2HL101589 · NHLBI · KAISER FOUNDATION RESEARCH INSTITUTE · PI GO, ALAN S, SINGER, DANIEL EDWIN · 2009 to 2010
$5.0M
EPIDEMIOLOGY OF ANTICOAGULATION IN ATRIAL FIBRILLATIONR01AG015478 · NIA · MASSACHUSETTS GENERAL HOSPITAL · PI SINGER, DANIEL EDWIN · 1997 to 2005
$4.1M
Risks of Warfarin for Elders with Atrial FibrillationK23AG028978 · NIA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI FANG, MARGARET C. · 2006 to 2010
$866k
NHLBI NIH HHS RC2 HL101589NHLBI NIH HHS RC2HL101589NHLBI NIH HHS U19 HL091179NHLBI NIH HHS U19 HL91179NIA NIH HHS K23 AG028978NIA NIH HHS K23 AG28978NIA NIH HHS R01 AG015478NIA NIH HHS R01 AG15478
6 · The paper itself

Abstract

backgroundAlthough warfarin is widely recommended to prevent atrial fibrillation-related thromboembolism, many eligible patients do not take warfarin. The objective of this study was to describe factors associated with warfarin discontinuation in patients newly starting warfarin for atrial fibrillation. METHODS AND

resultsWe identified 4188 subjects newly starting warfarin in the Anticoagulation and Risk Factors in Atrial Fibrillation Study and tracked longitudinal warfarin use through pharmacy and laboratory databases. Data on patient characteristics, international normalized ratio (INR) tests, and incident hospitalizations for hemorrhage were obtained from clinical and laboratory databases. Multivariable Cox regression analysis was used to identify independent predictors of prolonged warfarin discontinuation, defined as ≥180 consecutive days off warfarin. Within 1 year after warfarin initiation, 26.3% of subjects discontinued therapy despite few hospitalizations for hemorrhage (2.3% of patients). The risk of discontinuation was higher in patients aged <65 years (adjusted hazard ratio [HR], 1.33 [95% CI, 1.03 to 1.72] compared to those aged ≥85 years), patients with poorer anticoagulation control (HR, 1.46 [95% CI, 1.42 to 1.49] for every 10% decrease in time in therapeutic INR range), and patients with lower stroke risk (HR, 2.54 [95% CI, 1.86 to 3.47] for CHADS(2) stroke risk index of 0 compared to 4 to 6).

conclusionsMore than 1 in 4 patients newly starting warfarin for atrial fibrillation discontinued therapy in the first year despite a low overall hemorrhage rate. Individuals deriving potentially less benefit from warfarin, including those with younger age, fewer stroke risk factors, and poorer INR control, were less likely to remain on warfarin. Maximizing the benefits of anticoagulation for atrial fibrillation depends on determining which patients are most appropriately initiated and maintained on therapy.

Indexed as

Age FactorsWithholding TreatmentAgedAtrial FibrillationDisease ProgressionFemaleFollow-Up StudiesHumansInternational Normalized RatioMaleProportional Hazards ModelsRisk FactorsThromboembolismWarfarinWarfarin

Identifiers

PMID20959565
PMCPMC3063305
OpenAlexW2106143461

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.