Evidence map›Paper›PMID 35834596›Full record

SynthesisPloS one2022

Association between MTHFR (677C>T and 1298A>C) polymorphisms and psychiatric disorder: A meta-analysis.

Xinyao Meng, Ji-Long Zheng, Mao-Ling Sun, Hai-Yun Lai, Bao-Jie Wang, Jun Yao, Hongbo Wang

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in PloS one, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.2field-weighted citation impact, top 22% 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

8 citing papers in PubMed, 8 citations in OpenAlex.

  1. Article
  2. Review
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  4. Article
  5. Review
  6. Association betweenPeerJ · 2025
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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

7 authors at 3 institutions in 1 country.

Xinyao MengSchool of Basic Medicine, Shenyang Medical College, Shenyang, P.R. China.
Ji-Long ZhengDepartment of Forensic Medicine, China Criminal Police College, Shenyang, P.R. China.
Mao-Ling SunSchool of Forensic Medicine, China Medical University, Shenyang, P.R. China.ORCID 0000-0001-9451-6005
Hai-Yun LaiSchool of Forensic Medicine, China Medical University, Shenyang, P.R. China.
Bao-Jie WangSchool of Forensic Medicine, China Medical University, Shenyang, P.R. China.
Jun YaoSchool of Forensic Medicine, China Medical University, Shenyang, P.R. China.ORCID 0000-0003-0781-5694
Hongbo WangSchool of Basic Medicine, Shenyang Medical College, Shenyang, P.R. China.ORCID 0000-0002-5030-5529
China Medical University · CNShenyang Medical College · CNCriminal Investigation Police University of China · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recent studies showed that genetic polymorphism of 5,10-methylenetetrahydrofolate reductase (MTHFR) is related to attention-deficit hyperactivity disorder (ADHD), bipolar disorder (BD) and schizophrenia (SCZ). However, no consistent conclusion has been determined. This meta-analysis aims to interrogate the relationship between MTHFR gene polymorphisms (677C>T and 1298A>C) and the occurrence of ADHD, BD and SCZ. We retrieved case-control studies that met the inclusion criteria from the PubMed database. Associations between MTHFR polymorphisms (677C>T and 1298A>C) and ADHD, BD and SCZ were measured by means of odds ratios (ORs) using a random effects model and 95% confidence intervals (CIs). Additionally, sensitivity analysis and publication bias were performed. After inclusion criteria were met, a total of five studies with ADHD including 434 cases and 670 controls, 18 studies with BD including 4167 cases and 5901 controls and 44 studies with SCZ including 16,098 cases and 19913 controls were finally included in our meta-analysis. Overall, our meta-analytical results provided evidence that the MTHFR 677C>T was associated with occurrence of BD and SCZ, while the 1298A>C polymorphism was related to ADHD and BD, and additionally the sensitivity analysis indicated these results were stable and reliable. This may provide useful information for relevant studies on the etiology of psychiatric disorders.

Indexed as

Mental DisordersMethylenetetrahydrofolate Reductase (NADPH2)Case-Control StudiesGenetic Predisposition to DiseaseGenotypeHumansPolymorphism, GeneticPolymorphism, Single NucleotideMethylenetetrahydrofolate Reductase (NADPH2)MTHFR protein, human

Identifiers

PMID35834596
PMCPMC9282595
OpenAlexW4285388702

What OpenQuestion holds

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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.