Trial reportEuropean heart journal2012

Effects of n-3 fatty acids on major cardiovascular events in statin users and non-users with a history of myocardial infarction.

Simone R B M Eussen, Johanna M Geleijnse, Erik J Giltay, Cathy J M Rompelberg, Olaf H Klungel, Daan Kromhout

Open access · bronzeAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in European heart journal, 2012. The graph read 1 number from its abstract, feeding 1 cell of the map, but none could be read as for or against, so it casts no vote. Cited by 39 papers, 10 of them syntheses that pooled it.

1number the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 10 pooled it
10.3field-weighted citation impact, top 1% 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.

Read, but not usablea number the graph found but could not read as for or against

Cardiovascular eventscomparator not stated · ascvd, obesityfeeds one cell of the map
HR 1.020.80 to 1.31P = 0.88
In statin users, an additional amount of n-3 fatty acids did not reduce cardiovascular events [HR(adj) 1.02; 95% confidence interval (CI): 0.80, 1.31; P = 0.88].

clause the extractor read what became the number

2 · Its place on the map

Where it lands on the map

Rows are treatments, columns are outcomes. The coloured squares are the cells this paper feeds, coloured by the vote it casts there. Click one to jump to what this paper adds to it.

supports the treatmentfavours the comparatorno clear differenceread, but no usable result
3 · What it changes

What it adds to each cell

For every cell the paper feeds: the belief in the claim with and without this paper, and this paper's estimate drawn against every other readable study in the cell. The ringed dot is this paper.

Statins×cardiovascular events

No readable resultOpen on the map →What to test next →

29 readable studies in this cell: 18 favour the treatment, 9 find no difference, 2 favour the comparator.

Belief with this paper
0.86replicated · 12 families support, 2 contradict · against placebo
Without itNot a counted family in this claim, so removing it changes nothing.
← favours the treatmentfavours the comparator →
1 · no effect

This paper's own estimate is on a different scale from the rest of the cell, so it is not drawn here.

4 · 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.

5 · Its place in the literature

Who cites it

39 citing papers in PubMed, 10 syntheses or guidelines pooled it, 96 citations in OpenAlex.

  1. Pooled it
  2. Marine-derived n-3 fatty acids therapy for stroke.The Cochrane database of systematic reviews · 2022
    Pooled it
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  5. Marine-derived n-3 fatty acids therapy for stroke.The Cochrane database of systematic reviews · 2019
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  11. Trial
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  13. Update on the Vitamin D and OmegA-3 trial (VITAL).The Journal of steroid biochemistry and molecular biology · 2016
    Trial
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  16. Alpha-Linolenic Acid and Cardiovascular Events: A Narrative Review.International journal of molecular sciences · 2023
    Review
  17. Article
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6 · The record

Corrections and comments

7 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Simone R B M EussenDivision of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands.
Johanna M Geleijnse
Erik J Giltay
Cathy J M Rompelberg
Olaf H Klungel
Daan Kromhout
National Institute for Public Health and the Environment · NLWageningen University & Research · NLLeiden University Medical Center · NLUtrecht University · NL

Funding

No grant is acknowledged in the PubMed record.

8 · The paper itself

Abstract

The marked sentences are the ones the graph read a number from.

aimsRecent secondary prevention trials have failed to demonstrate a beneficial effect of n-3 fatty acids on cardiovascular outcomes, which may be due to the growing use of statins since the mid-1990s. The aim of the present study was to assess whether statins modify the effects of n-3 fatty acids on major adverse cardiovascular events in patients with a history of myocardial infarction (MI). METHODS AND

resultsPatients who participated in the Alpha Omega Trial were divided into consistent statin users (n = 3740) and consistent statin non-users (n = 413). In these two groups of patients, the effects of an additional daily amount of 400 mg eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA), 2 g α-linolenic acid (ALA), or both on major cardiovascular events were evaluated. Multivariable Cox's proportional hazard models were used to calculate adjusted hazard rate ratios (HR(adj)). Among the statin users 495 (13%) and among the statin non-users 62 (15%) developed a major cardiovascular event. In statin users, an additional amount of n-3 fatty acids did not reduce cardiovascular events [HR(adj) 1.02; 95% confidence interval (CI): 0.80, 1.31; P = 0.88]. In statin non-users, however, only 9% of those who received EPA-DHA plus ALA experienced an event compared with 18% in the placebo group (HR(adj) 0.46; 95% CI: 0.21, 1.01; P= 0.051).

conclusionIn patients with a history of MI who are not treated with statins, low-dose supplementation with n-3 fatty acids may reduce major cardiovascular events. This study suggests that statin treatment modifies the effects of n-3 fatty acids on the incidence of major cardiovascular events.

Indexed as

MargarineAgedAged, 80 and overCardiovascular AgentsCardiovascular DiseasesDietary SupplementsDouble-Blind MethodDrug InteractionsFatty Acids, Omega-3FemaleHeart ArrestHumansHydroxymethylglutaryl-CoA Reductase InhibitorsLipid MetabolismMaleMiddle AgedCardiovascular AgentsFatty Acids, Omega-3Hydroxymethylglutaryl-CoA Reductase InhibitorsMargarine

Identifiers

PMID22301766
PMCPMC3388014
OpenAlexW2100471832

What OpenQuestion holds

Texttitle and abstract
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.