Evidence map›Paper›PMID 32404177›Full record

ArticleBMC cardiovascular disorders2020

Association of methylenetetrahydrofolate reductase (MTHFR) variant C677T and risk of carotid atherosclerosis: a cross-sectional analysis of 730 Chinese Han adults in Chongqing.

Xulei Peng, Yongli Zhou, Xiaoxing Wu, Xiaolin Wang, Huili Bai, Yongqiang Li, Zhichao Wang, Xuan Chen, Yonghong Wang

Open access · goldAbstract read
In one paragraph

Article in BMC cardiovascular disorders, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.2field-weighted citation impact, top 21% 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, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Retinal vascular dysfunction in the MthfrAlzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  3. Review
  4. Article
  5. TheJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2022
    Article
  6. Article
  7. 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

9 authors at 2 institutions in 1 country.

Xulei PengDepartment of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Yongli ZhouHealth Management Department, Chongqing General Hospital, Chongqing, China.
Xiaoxing WuDepartment of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Xiaolin WangHealth Management Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Huili BaiDepartment of the Clinical molecular Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Yongqiang LiHealth Management Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Zhichao WangEmergency Department, The Third Affiliated Hospital Of ChongQing Medical University, Chongqing, China.
Xuan ChenDepartment of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Yonghong WangHealth Management Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China. wyh0232983@163.com.ORCID 0000-0002-0611-2834
The Affiliated Yongchuan Hospital of Chongqing Medical University · CNFirst People's Hospital of Chongqing · CN

Funding

Chongqing Science and Technology Committee and Health Commission Joint Project grant No.2019ZLXM004Science and Technology Planning Project of Chongqing Province, China cstc2015jcsf10012-03
6 · The paper itself

Abstract

backgroundUncertainty still remains on the correlation of methylenetetrahydrofolate reductase (MTHFR) variant C677T with risk of carotid atherosclerosis (CAS), and there is a lack of reports on C677T/MTHFR in the Asian population. The association of C677T/MTHFR polymorphisms with CAS in the Chinese Han population in Chongqing was investigated in the present study.

methodsSubjects (n = 730, 214 females and 516 males, Han ethnicity) who provided an informed consent were randomly selected from the general population of Chongqing, China. Polymerase chain reaction-restriction fragment length polymorphism and Sanger sequencing genotyping assays were used to determine the MTHFR genotypes. The atherosclerosis index of the intima-media thickness (IMT) was measured by high-resolution ultrasound to evaluate the CAS. Less than 1.0 mm was considered as normal for IMT, 1.0-1.5 mm was considered as thickening, and ≥ 1.5 mm and a local bulge thickened in the lumen was considered as CAS. According to the carotid ultrasonography results, these subjects were divided into two groups: CAS-group (IMT ≥ 1.0 mm) and control group (IMT < 1.0 mm).

resultsThe frequency of C/T heterozygotes, T/T homozygotes genotype was significantly higher in the subjects with CAS (62% vs. 36.9%; 16.2% vs. 9.5%; 47.2% vs. 27.9%, P < 0.05), while the frequency of C/C homozygotes and C allele was significantly lower (21.8% vs. 53.7%; 52.8% vs. 72.1%, P < 0.05), when compared to the control group. The risk of CAS was higher for subjects with C/T heterozygotes and T/T homozygotes (OR = 4.06, 95% CI: 2.76-5.98, P < 0.001 and OR = 3.14, 95% CI: 1.73-5.69, P < 0.001, respectively), when compared to the subjects with the C/C genotype. In the model 1 (CT + TT versus CC), C677T/MTHFR was significantly associated with the prevalence of CAS, and the all adjusted OR values for CAS were 3.87 (95% CI, 2.67 to 5.62) in all, 17.18 (95% CI, 7.27 to 40.49) in women and 2.57 (95% CI, 1.65 to 3.99) in men after adjusting for potential confounding factors.

conclusionsThe present study suggests that a mutation in the methylenetetrahydrofolate reductase gene is a risk factor of CAS in the Chinese Han population.

Indexed as

Polymorphism, GeneticAdultAsian PeopleCarotid Artery DiseasesCarotid Intima-Media ThicknessChinaCross-Sectional StudiesFemaleGene FrequencyGenetic Predisposition to DiseaseHumansMaleMethylenetetrahydrofolate Reductase (NADPH2)Middle AgedPhenotypeRisk AssessmentMethylenetetrahydrofolate Reductase (NADPH2)MTHFR protein, humanCarotid arterosclerosisChineseMethylenetetrahydrofolate reductaseRisk factors

Identifiers

PMID32404177
PMCPMC7222312
OpenAlexW3024856794

What OpenQuestion holds

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LicenceCC BY
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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.