Evidence map›Paper›PMID 23966030›Full record

ArticleHeart (British Cardiac Society)2013

Ischaemic heart disease, influenza and influenza vaccination: a prospective case control study.

C Raina Macintyre, Anita E Heywood, Pramesh Kovoor, Iman Ridda, Holly Seale, Timothy Tan, Zhanhai Gao, Anthea L Katelaris, Ho Wai Derrick Siu, Vincent Lo and 2 more

Open access · hybridAbstract readComparative Study
In one paragraph

Article in Heart (British Cardiac Society), 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 7 pooled it
5.1field-weighted citation impact, top 4% 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

40 citing papers in PubMed, 7 syntheses or guidelines pooled it, 94 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Vaccines for preventing influenza in healthy adults.The Cochrane database of systematic reviews · 2018
    Pooled it
  6. Pooled it
  7. Pooled it
  8. Trial
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. What if flu vaccination is the most responsible thing to do for cardiovascular health in the upcoming season?European heart journal supplements : journal of the European Society of Cardiology · 2023
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors at 4 institutions in 2 countries.

C Raina MacintyreSchool of Public Health and Community Medicine, UNSW Medicine, the University of New South Wales, , Sydney, New South Wales, Australia.
Anita E Heywood
Pramesh Kovoor
Iman Ridda
Holly Seale
Timothy Tan
Zhanhai Gao
Anthea L Katelaris
Ho Wai Derrick Siu
Vincent Lo
Richard Lindley
Dominic E Dwyer
UNSW Sydney · AUWestmead Hospital · AUNational Centre for Immunisation Research & Surveillance · AUThe University of Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAbundant, indirect epidemiological evidence indicates that influenza contributes to all-cause mortality and cardiovascular hospitalisations with studies showing increases in acute myocardial infarction (AMI) and death during the influenza season.

objectiveTo investigate whether influenza is a significant and unrecognised underlying precipitant of AMI.

designCase-control study.

settingTertiary referral hospital in Sydney, Australia, during 2008 to 2010. PATIENTS: Cases were inpatients with AMI and controls were outpatients without AMI at a hospital in Sydney, Australia.

main outcome measuresPrimary outcome was laboratory evidence of influenza. Secondary outcome was baseline self-reported acute respiratory tract infection.

resultsOf 559 participants, 34/275 (12.4%) cases and 19/284 (6.7%) controls had influenza (OR 1.97, 95% CI 1.09 to 3.54); half were vaccinated. None were recognised as having influenza during their clinical encounter. After adjustment, influenza infection was no longer a significant predictor of recent AMI. However, influenza vaccination was significantly protective (OR 0.55, 95% CI 0.35 to 0.85), with a vaccine effectiveness of 45% (95% CI 15% to 65%).

conclusionsRecent influenza infection was an unrecognised comorbidity in almost 10% of hospital patients. Influenza did not predict AMI, but vaccination was significantly protective but underused. The potential population health impact of influenza vaccination, particularly in the age group 50-64 years, who are at risk for AMI but not targeted for vaccination, should be further explored. Our data should inform vaccination policy and cardiologists should be aware of missed opportunities to vaccinate individuals with ischaemic heart disease against influenza.

Indexed as

VaccinationAdultAgedFemaleFollow-Up StudiesHumansIncidenceInfluenza A virusInfluenza, HumanInfluenza VaccinesMaleMiddle AgedMyocardial IschemiaNew South WalesPrognosisProspective StudiesInfluenza VaccinesCoronary Artery DiseaseInfection

Identifiers

PMID23966030
PMCPMC3841753
OpenAlexW2121183755

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.