Evidence map›Paper›PMID 34059516›Full record

Observational studyBMJ open2021

Socioeconomic inequality in oral anticoagulation therapy initiation in patients with atrial fibrillation with high risk of stroke: a register-based observational study.

Elin Danielsen Lunde, Albert Marni Joensen, Kirsten Fonager, Søren Lundbye-Christensen, Søren Paaske Johnsen, Mogens Lytken Larsen, Gregory Y H Lip, Sam Riahi

Abstract readObservational Study
In one paragraph

Observational study in BMJ open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
–field-weighted citation impact
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

26 citing papers in PubMed.

  1. Trial
  2. Observational
  3. Article
  4. Clinical complexity in patients with atrial fibrillation: exploring differential risk profiles from European and Asian cohorts.Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Social drivers in atrial fibrillation occurrence, screening, treatment, and outcomes: systematic-narrative hybrid review.European heart journal supplements : journal of the European Society of Cardiology · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Reimbursement and use of oral anticoagulants during 2014-2022 - A register-based study.Exploratory research in clinical and social pharmacy · 2023
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Income and outcomes of patients with incident atrial fibrillation.Journal of epidemiology and community health · 2022
    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

8 authors.

Elin Danielsen LundeDepartment of Cardiology, Aalborg University Hospital, Aalborg, Denmark e.lunde@rn.dk.ORCID 0000-0002-4058-953X
Albert Marni JoensenDepartment of Cardiology, Aalborg University Hospital, Aalborg, Denmark.
Kirsten FonagerDepartment of Clinical Medicine, Aalborg University, Aalborg, Denmark.
Søren Lundbye-ChristensenAalborg AF Study Group, Aalborg University Hospital, Aalborg, Denmark.
Søren Paaske JohnsenDanish Center for Clinical Health Services Research, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.
Mogens Lytken LarsenDepartment of Clinical Medicine, Aalborg University, Aalborg, Denmark.
Gregory Y H LipLiverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart and Chest Hospital, Liverpool, UK.
Sam RiahiDepartment of Cardiology, Aalborg University Hospital, Aalborg, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe study aimed to examine the association between socioeconomic factors (SEFs) and oral anticoagulation (OAC) therapy and whether it was influenced by changing guidelines. We hypothesised that inequities in initiation of OAC reduced over time as more detailed and explicit clinical guidelines were issued.

designRegister-based observational study. SETTINGS: All Danish patients with an incident hospital diagnosis of atrial fibrillation (AF), aged ≥30 years old and with high risk of stroke from 1 May 1999 to 2 October 2015 were included. Absolute risk differences (RD) (95% CI) were used to measure the association.

participants154 448 patients (mean age 78.2 years, men 47.3%). EXPOSURE: Education, family income and cohabiting status were the SEFs used as exposure. OUTCOME: A prescription of OAC within -30 to +90 days of baseline (incident AF).

resultsDuring 2002-2007, the crude RD of initiation of OAC for men with high education was 14.9% (12.8 to 16.9). Inequality reduced when new guidelines were published, and in 2013-2016 the crude RD was 5.6% (3.5 to 7.7). After adjusting for age, the RD substantially reduced. The same pattern was seen for cohabiting status, while inequality was smaller and more constant for income.

conclusionPatients with low income, low education and living alone were associated with lower chance of being initiated with OAC. For education and cohabiting status, the crude difference reduced around 2011, when more detailed clinical guidelines were implemented in Denmark. Our results indicate that new guidelines might reduce inequality in OAC initiation and that new, high-cost drugs increase inequality.

Indexed as

Atrial FibrillationStrokeAdministration, OralAdultAgedAnticoagulantsHumansMaleRisk FactorsSocioeconomic FactorsAnticoagulantscardiologysocial medicinestrokethromboembolism

Identifiers

PMID34059516
PMCPMC8169491

What OpenQuestion holds

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LicenceCC BY-NC
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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.