Evidence map›Paper›PMID 33064205›Full record

ArticleActa diabetologica2021

Elevated plasma trimethylamine-N-oxide levels are associated with diabetic retinopathy.

Weiming Liu, Chunmin Wang, Yu Xia, Wei Xia, Gaoqin Liu, Chi Ren, Yu Gu, Xin Li, Peirong Lu

Open access · hybridAbstract read
In one paragraph

Article in Acta diabetologica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
4.8field-weighted citation impact, top 4% 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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it, 57 citations in OpenAlex.

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  13. Role of gut microbiomes in different ocular pathologies: A systematic review.World journal of gastrointestinal pathophysiology · 2025
    Article
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  15. Early-stage diabetic retinopathy: gut-metabolic triggers, immune-neurodegeneration, and interventions.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 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

9 authors at 2 institutions in 1 country.

Weiming Liu *Department of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China.
Chunmin Wang *Suzhou Center for Disease Control and Prevention, 72 Sanxiang Road, Suzhou, 215004, People's Republic of China.
Yu XiaSuzhou Center for Disease Control and Prevention, 72 Sanxiang Road, Suzhou, 215004, People's Republic of China.
Wei XiaDepartment of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China.
Gaoqin LiuDepartment of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China.
Chi RenDepartment of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China.
Yu GuDepartment of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China.
Xin LiDepartment of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China.
Peirong LuDepartment of Ophthalmology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China. lupeirong@suda.edu.cn.ORCID http://orcid.org/0000-0002-1423-1737
Soochow University · CNChinese Center For Disease Control and Prevention · CN

Funding

Jiangsu Provincial Medical Innovation Team CXTDA2017039National Natural Science Foundation of China 81671641National Natural Science Foundation of China 81970830Soochow Scholar Project of Soochow University R5122001
6 · The paper itself

Abstract

aimsTo determine the relationship between plasma levels of trimethylamine-N-oxide (TMAO) and odds of diabetic retinopathy (DR).

methodsA cross-sectional study was conducted. Blood samples were obtained from 122 type 2 diabetes mellitus (T2DM) patients with or without DR. Multivariable logistic regression analyses were performed to identify the association between plasma TMAO and DR. The diagnostic value of plasma TMAO was assessed by the area under the receiver operating characteristic curve (AUROC) and integrated discrimination improvement (IDI).

resultsIn the T2DM patients, plasma levels of TMAO were significantly higher in patients with DR compared with those without DR (P = 0.001). As logarithmic (ln) transformation of TMAO increased per standard deviation (SD), there was higher probability to have DR [odds ratio (OR) = 2.31; P = 0.005]. As ln-transformed TMAO increased per SD, the severity of DR was more likely to get worse (OR = 2.05; P = 0.004). In the diagnostic model, the addition of TMAO contributed to the improvement in AUROC from 0.646 to 0.734 (P = 0.043), and the IDI was 10.7% (P < 0.001).

conclusionElevated levels of plasma TMAO were associated with higher odds and worse severity of DR in T2DM patients, and further investigation is required for the causality of this association.

Indexed as

AdultAgedAged, 80 and overBiomarkersCase-Control StudiesChinaCross-Sectional StudiesDiabetes Mellitus, Type 2Diabetic RetinopathyFemaleGastrointestinal MicrobiomeHumansMaleMethylaminesMiddle AgedPrognosisBiomarkersMethylaminestrimethyloxamineDiabetic retinopathyGut microbiomeMetaboliteTMAOTrimethylamine-N-oxideType 2 diabetes mellitus

Identifiers

PMID33064205
PMCPMC7889550
OpenAlexW3093033471

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.