Evidence map›Paper›PMID 35292565›Full record

SynthesisJournal of neurointerventional surgery2023

Effects of endovascular therapy for mild stroke due to proximal or M2 occlusions: meta-analysis.

Chun-Hsien Lin, Jeffrey L Saver, Bruce Ovbiagele, Sung-Chun Tang, Meng Lee, David S Liebeskind

Abstract readComparative StudyMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Journal of neurointerventional surgery, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
–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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
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  4. Article
  5. Review
  6. Investigation of thrombectomy technique for M2 occlusion based on the M1-M2 bifurcation angle.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
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  10. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Chun-Hsien LinNeurology, Chang Gung University College of Medicine, Chang Gung Memorial Hospital Chiayi Branch, Puzi, Taiwan.ORCID http://orcid.org/0000-0003-0942-7492
Jeffrey L SaverNeurology, UCLA, Los Angeles, California, USA.
Bruce OvbiageleUniversity of California San Francisco, San Francisco, California, USA.
Sung-Chun TangStroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan.
Meng LeeNeurology, Chang Gung University College of Medicine, Chang Gung Memorial Hospital Chiayi Branch, Puzi, Taiwan menglee5126@gmail.com.ORCID http://orcid.org/0000-0002-7491-0571
David S LiebeskindNeurology, UCLA, Los Angeles, California, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo conduct a meta-analysis to evaluate the effect of endovascular therapy (EVT) in mild acute ischemic stroke (AIS) due to proximal versus distal occlusions.

methodsWe searched PubMed, Embase, the Cochrane Library, and clinicaltrials.gov from January 2000 to September 2021 to identify studies comparing EVT versus best medical management (BMM) in AIS with National Institutes of Health Stroke Scale (NIHSS) scores ≤5 due to proximal internal carotid artery (ICA) or M1 versus distal M2 occlusions. We included studies that reported the number of patients with proximal or distal occlusions separately and reported the number of patients with freedom of disability (modified Rankin Scale (mRS) score 0-1) or functional independence (mRS score 0-2) at 90 days in proximal or M2 occlusions, respectively. OR with 95% CI was used.

resultsWe identified six studies with 653 proximal ICA and M1 occlusion patients and 666 distal M2 occlusion patients. Pooled results showed EVT versus BMM was associated with a higher rate of being disability-free in patients with proximal occlusions (OR 1.58, 95% CI 1.09 to 2.30), but was associated with a lower rate of being disability-free in patients with M2 occlusions (OR 0.70, 95% CI 0.49 to 0.99). Effect of EVT in proximal versus distal occlusions was substantially different (P for interaction=0.002). A similar pattern was seen for functional independence (P for interaction=0.05).

conclusionsFor patients with mild AIS, observational data suggest that EVT may be beneficial for proximal ICA or M1 but not for distal M2 occlusions. Randomized trials are needed to confirm these findings. PROSPERO REGISTRATION NUMBER: CRD42021281034.

Indexed as

Carotid Artery DiseasesEndovascular ProceduresInfarction, Middle Cerebral ArteryIschemic StrokeThrombectomyBrain IschemiaHumansTreatment OutcomeStrokeThrombectomyThrombolysis

Identifiers

PMID35292565
PMCPMC10086511

What OpenQuestion holds

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LicenceCC BY-NC
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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.