Evidence map›Paper›PMID 30157246›Full record

SynthesisPloS one2018

Prevalence and geographical variation of Factor V Leiden in patients with cerebral venous thrombosis: A meta-analysis.

Xinyuan Li, Li Cui, Yunbo Li, Lijun Zhu, Chenglin Wang, Jing Liu, Shaokuan Fang

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
0.3field-weighted citation impact, top 38% 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

7 citing papers in PubMed, 11 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Clinical Impact of Inherited Thrombophilia in Patients With Thrombosis: Evaluating the Real Risk of FVL, PTG20210A, and MTHFR Mutations in the Kurdistan Region of Iraq.Clinical and applied thrombosis/hemostasis : official journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis
    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

7 authors at 2 institutions in 1 country.

Xinyuan LiDepartment of Neurology, Neuroscience Centre, the First Teaching Hospital of Jilin University, Changchun, China.
Li CuiDepartment of Neurology, Neuroscience Centre, the First Teaching Hospital of Jilin University, Changchun, China.
Yunbo LiDepartment of Neurosurgery, the First Teaching Hospital of Jilin University, Changchun, China.
Lijun ZhuChina-Japan Union Hospital of Jilin University, Changchun, China.
Chenglin WangDepartment of Neurology, Neuroscience Centre, the First Teaching Hospital of Jilin University, Changchun, China.
Jing LiuDepartment of Neurology, Neuroscience Centre, the First Teaching Hospital of Jilin University, Changchun, China.
Shaokuan FangDepartment of Neurology, Neuroscience Centre, the First Teaching Hospital of Jilin University, Changchun, China.ORCID 0000-0002-7980-281X
Jilin University · CNUnion Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPrevious results regarding the prevalence of Factor V Leiden (FVL) in patients with cerebral venous thrombosis (CVT) varied remarkably. Therefore, we performed a meta-analysis to evaluate the potential association between FVL and CVT.

methodsThe PubMed, Embase, Cochrane Central Register of Controlled Trials, and Web of Science were searched for relevant case-control studies. The data were pooled for analysis of the association between FVL and CVT with a random-effects model. Subgroup and sensitivity analyses were performed to evaluate the robustness of the results. Publication bias was assessed by funnel plot and the Egger's test.

resultsA total of 39 case-control studies including 1807 cases of CVT and 7699 control cases were included. FVL was more common in patients with CVT (195/1822) than in controls(369/7795), [odds ratio(OR) = 2.70, 95% confidence interval(CI) 2.16-3.38, P < 0.00001]. Results of subgroup analyses indicated that the association between FVL and CVT varied according to geographic regions. The associations between FVL and CVT were significant in studies from Germany (OR = 2.42, 95%CI 1.70-3.45, P < 0.00001), Brazil(OR = 2.82, 95%CI 1.24-6.42, P = 0.01), France (OR = 5.44, 95%CI 1.35-21.92, P = 0.02), Iran (OR = 6.61, 95%CI 1.83-23.93, P = 0.004), and Tunisia (OR = 6.54, 95%CI 2.89-14.82, P < 0.00001), but not in those from Italy (OR = 1.49, 95%CI 0.59-3.78, P = 0.40) or the US (OR = 2.37, 95%CI 0.59-9.42, P = 0.22).

conclusionFVL may be more common in patients with CVT. However, the association between FVL and CVT varied depending on the geographic origin of the studies.

Indexed as

Factor VGenetic Predisposition to DiseaseGeography, MedicalHumansIntracranial ThrombosisMolecular EpidemiologyPrevalenceVenous ThrombosisFactor Vfactor V Leiden

Identifiers

PMID30157246
PMCPMC6114929
OpenAlexW2889109995

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.