Evidence map›Paper›PMID 28826396›Full record

SynthesisBMC medical genetics2017

Association between fat mass and obesity associated (FTO) gene rs9939609 A/T polymorphism and polycystic ovary syndrome: a systematic review and meta-analysis.

Ai Ling Liu, Hui Jun Xie, Hong Yan Xie, Jun Liu, Jie Yin, Jin Song Hu, Cui Ying Peng

Registry-linked trialOpen access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC medical genetics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07505212 (Exploring Tannin-Probiotic Interactions on Microbial Composition and Inflammatory Outcomes in Obesity), which is not on this map. Cited by 40 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 3 pooled it
10.0field-weighted citation impact, top 2% 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.

NCT07505212 naactive not recruitingnot on this mapstarted 2026, after this paper: background citation

Exploring Tannin-Probiotic Interactions on Microbial Composition and Inflammatory Outcomes in Obesity

TypeinterventionalSponsorPrairie View A&M UniversityRan2026 to 2026Enrolled20ConditionsObesity (Disorder)ArmsGallotannin-rich mango, Lactiplantibacillus pentosus (probiotic), No Treatment Added
3 · Its place in the literature

Who cites it

40 citing papers in PubMed, 3 syntheses or guidelines pooled it, 93 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
  5. Article
  6. The Prevalence and Associated Risk Factors of Polycystic Ovary Syndrome - A Retrospective Cohort Analysis.Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine · 2025
    Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. NImmunity, inflammation and disease · 2024
    Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Association of fat mass and obesity-associated (Journal of diabetes and metabolic disorders · 2022
    Review
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.

Ai Ling LiuInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.
Hui Jun XieInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.
Hong Yan XieInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.
Jun LiuInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.
Jie YinInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.
Jin Song HuInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.
Cui Ying PengInstitute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China. pengcuiying2004@126.com.ORCID 0000-0002-8689-1873
University of South China · CNHengyang Academy of Agricultural Sciences · CNHengyang Normal University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundUp to now, numerous case-control studies have reported the associations between fat mass and obesity associated (FTO) gene rs9939609 A/T polymorphism and polycystic ovary syndrome (PCOS), however, without a consistent result. Hence we performed current systematic review and meta-analysis to clarify the controversial results.

methodsCase-control studies reporting the relationship of rs9939609 A/T polymorphism and PCOS published before April 2015 were searched in Pubmed database without language restriction. Data was analyzed by Review Manager 5.2.

resultsA total of five studies involving 5010 PCOS patients and 5300 controls were included for further meta-analysis. The results of meta-analysis showed that the FTO gene rs9939609 A/T polymorphism was significantly different between PCOS group and control group in different gene models (For AA + AT vs. TT: OR = 1.41, 95% CI = 1.28-1.55, P < 0.00001. For AA vs. AT + TT: OR = 1.54, 95% CI = 1.25-1.89, P < 0.0001. For AA vs. TT: OR = 1.74, 95% CI = 1.38-2.18, P < 0.00001. For A vs. T: OR = 1.36, 95% CI = 1.25-1.47, P < 0.00001, respectively) suggesting that A allele was a risk factor for PCOS susceptibility. Furthermore, subgroup analysis in Asian and Caucasian ethnicities also found significant association between rs9939609 A/T polymorphism and PCOS (In Asian subgroup: OR = 1.43, 95% CI = 1.29-1.59, P < 0.0001. In Caucasian subgroup: OR = 1.33, 95% CI = 1.08-1.64, P = 0.008)

conclusionThis meta-analysis suggests that rs9939609 A/T polymorphism of FTO gene is associated with PCOS risk, and that A allele is a risk factor for PCOS susceptibility simultaneously.

Indexed as

AdiposityAllelesAlpha-Ketoglutarate-Dependent Dioxygenase FTOAsian PeopleBody Mass IndexDatabases, FactualFemaleGenetic Predisposition to DiseaseHumansObesityPolycystic Ovary SyndromePolymorphism, Single NucleotideRisk FactorsSensitivity and SpecificityWhite PeopleAlpha-Ketoglutarate-Dependent Dioxygenase FTOFTO protein, humanFTOMeta-analysisPolycystic ovary syndromePolymorphism

Identifiers

PMID28826396
PMCPMC5563909
OpenAlexW2745978271

What Socratic holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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 Socratic graph.