Evidence map›Paper›PMID 33198608›Full record

Trial reportStroke2020

Ticagrelor Added to Aspirin in Acute Nonsevere Ischemic Stroke or Transient Ischemic Attack of Atherosclerotic Origin.

Pierre Amarenco, Hans Denison, Scott R Evans, Anders Himmelmann, Stefan James, Mikael Knutsson, Per Ladenvall, Carlos A Molina, Yongjun Wang, S Claiborne Johnston and 1 more

Registry-linked trialOpen access · hybridAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Stroke, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03354429 (A Randomised, Double-Blind, Placebo-Controlled, International, Multicentre, Phase III Study to Investigate the Efficacy and Safety of Ticagrelor and ASA Compared With ASA in the Prevention of Stroke and Death in Patients With Acute Ischaemic Stroke or Transient Ischaemic Attack), which is not on this map. Cited by 48 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed, 1 pooled it
9.4field-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.

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.

NCT03354429 phase3completednot on this map

A Randomised, Double-Blind, Placebo-Controlled, International, Multicentre, Phase III Study to Investigate the Efficacy and Safety of Ticagrelor and ASA Compared With ASA in the Prevention of Stroke and Death in Patients With Acute Ischaemic Stroke or Transient Ischaemic Attack

TypeinterventionalSponsorAstraZenecaRan2018 to 2019Enrolled11,016ConditionsAcute Ischaemic Stroke, Transient Ischaemic AttackArmsTicagrelor, Placebo
3 · Its place in the literature

Who cites it

48 citing papers in PubMed, 1 synthesis or guideline pooled it, 98 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  10. Article
  11. Review
  12. Aspirin-ticagrelor use after mild acute ischemic stroke: Findings from the get with the guidelines-stroke registry.Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association · 2026
    Article
  13. Article
  14. Review
  15. Review
  16. Targeted drug delivery systems for atherosclerosis.Journal of nanobiotechnology · 2025
    Review
  17. Observational
  18. Article
  19. Review
  20. 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

11 authors at 2 institutions in 1 country.

Pierre AmarencoDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Hans DenisonDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Scott R EvansDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Anders HimmelmannDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Stefan JamesDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Mikael KnutssonDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Per LadenvallDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Carlos A MolinaDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
Yongjun WangDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
S Claiborne JohnstonDepartment of Neurology and Stroke Center, Bichat University Hospital, University of Paris, France (P.A.).
THALES Steering Committee and Investigators*
Université Sorbonne Paris Nord · FRHôpital Bichat-Claude-Bernard · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeAmong patients with a transient ischemic attack or minor ischemic strokes, those with ipsilateral atherosclerotic stenosis of cervicocranial vasculature have the highest risk of recurrent vascular events.

methodsIn the double-blind THALES (The Acute Stroke or Transient Ischemic Attack Treated With Ticagrelor and ASA for Prevention of Stroke and Death) trial, we randomized patients with a noncardioembolic, nonsevere ischemic stroke, or high-risk transient ischemic attack to ticagrelor (180 mg loading dose on day 1 followed by 90 mg twice daily for days 2-30) or placebo added to aspirin (300-325 mg on day 1 followed by 75-100 mg daily for days 2-30) within 24 hours of symptom onset. The present paper reports a prespecified analysis in patients with and without ipsilateral, potentially causal atherosclerotic stenosis ≥30% of cervicocranial vasculature. The primary end point was time to the occurrence of stroke or death within 30 days.

resultsOf 11 016 randomized patients, 2351 (21.3%) patients had an ipsilateral atherosclerotic stenosis. After 30 days, a primary end point occurred in 92/1136 (8.1%) patients with ipsilateral stenosis randomized to ticagrelor and in 132/1215 (10.9%) randomized to placebo (hazard ratio 0.73 [95% CI, 0.56-0.96],

conclusionsIn this exploratory analysis comparing ticagrelor added to aspirin to aspirin alone, we found no treatment by ipsilateral atherosclerosis stenosis subgroup interaction but did identify a higher absolute risk and a greater absolute risk reduction of stroke or death at 30 days in patients with ipsilateral atherosclerosis stenosis than in those without. In this easily identified population, ticagrelor added to aspirin provided a clinically meaningful benefit with a number needed to treat of 34 (95% CI, 19-171). Registration: URL: https://www.clinicaltrials.gov. Unique identifier: NCT03354429.

Indexed as

AgedAspirinAtherosclerosisCerebrovascular DisordersConstriction, PathologicDual Anti-Platelet TherapyFemaleHumansIschemic Attack, TransientIschemic StrokeMaleMiddle AgedPlatelet Aggregation InhibitorsProportional Hazards ModelsRecurrenceSecondary PreventionAspirinPlatelet Aggregation InhibitorsTicagreloraspirinatherosclerosisdeathpopulationstroketicagrelortransient ischemic attack

Identifiers

PMID33198608
PMCPMC7678660
OpenAlexW3100094639

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

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.