Evidence map›Paper›PMID 30785218›Full record

ArticleAnnals of neurology2019

Homocysteine and small vessel stroke: A mendelian randomization analysis.

Susanna C Larsson, Matthew Traylor, Hugh S Markus

Abstract read
In one paragraph

Article in Annals of neurology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing 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

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

  1. Pooled it
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  13. Stroke and frailty index: a two-sample Mendelian randomisation study.Aging clinical and experimental research · 2024
    Article
  14. Article
  15. The Multitarget Action of Vitamins in the Ischemic Stroke.Current topics in medicinal chemistry · 2024
    Review
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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

3 authors.

Susanna C LarssonUnit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.ORCID 0000-0003-0118-0341
Matthew TraylorStroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom.ORCID 0000-0001-6624-8621
Hugh S MarkusStroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom.

Funding

British Heart Foundation RG/16/4/32218European Union's Horizon 2020 research and innovation programme (COSTREAM) 667375Forskningsrådet om Hälsa, Arbetsliv och Välfärd 2018-00123
6 · The paper itself

Abstract

objectiveTrials of B vitamin therapy to lower blood total homocysteine (tHcy) levels for prevention of stroke are inconclusive. Secondary analyses of trial data and epidemiological studies suggest that tHcy levels may be particularly associated with small vessel stroke (SVS). We assessed whether circulating tHcy and B vitamin levels are selectively associated with SVS, but not other stroke subtypes, using Mendelian randomization.

methodsWe used summary statistics data for single-nucleotide polymorphisms (SNPs) associated with tHcy (n = 18), folate (n = 3), vitamin B

resultsGenetically predicted tHcy was associated with SVS, with an odds ratio of 1.34 (95% confidence interval [CI], 1.13-1.58; p = 6.7 × 10

interpretationThese findings suggest that any effect of homocysteine-lowering treatment in preventing stroke will be confined to the SVS subtype. Whether genetic variants at or near the MTHFR and MUT genes influence SVS risk through pathways other than homocysteine levels and downstream effects require further investigation. Ann Neurol 2019;85:495-501.

Indexed as

Brain IschemiaHomocysteineHumansMendelian Randomization AnalysisMicrovesselsPolymorphism, Single NucleotideStrokeVitamin B 12HomocysteineVitamin B 12

Identifiers

PMID30785218
PMCPMC6594149

What OpenQuestion holds

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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.