Evidence map›Paper›PMID 41811798›Full record

ArticleCanadian journal of gastroenterology & hepatology2026

Association Between Inflammatory Bowel Disease and Venous Leg Ulcers: Insight From Mendelian Randomization Analyses.

Yanfeng Lin, Xiaohui Qin, Haiyan Zhang, Jinke Huang

Abstract read
In one paragraph

Article in Canadian journal of gastroenterology & hepatology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
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

1 citing paper in PubMed.

  1. 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

4 authors.

Yanfeng LinDepartment of Gastroenterology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China, gzucm.edu.cn.ORCID 0000-0001-6700-0230
Xiaohui QinDepartment of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China, gzucm.edu.cn.ORCID 0009-0007-7243-6013
Haiyan ZhangDepartment of Gastroenterology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China, gzucm.edu.cn.ORCID 0000-0002-0379-0939
Jinke HuangDepartment of Gastroenterology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China, gzucm.edu.cn.ORCID 0000-0002-5623-0564

Funding

Clinical Collaboration Project of Integrated Traditional Chinese and Western Medicine on Major and Complex Diseases: Crohn's Disease ZDYN-2024-A-079National Natural Science Foundation of China 82505455Specific Research Fund for TCM Science and Technology of Guangdong Province Hospital of Chinese Medicine YN2024GZRPY030
6 · The paper itself

Abstract

backgroundThis study aimed to investigate the potential causal relationship between inflammatory bowel disease (IBD) and venous leg ulcers (VLU) using Mendelian randomization (MR). MATERIALS AND

methodsIndependent genetic variants for IBD and VLU were selected as instruments from previously published genome-wide association studies (GWAS) in people of primarily European descent. MR analyses were carried out utilizing inverse-variance weighted (IVW), weighted median, MR Egger, simple mode, and weighted mode.

resultsGenetically predicted IBD was not associated with VLU, according to the IVW analysis (OR 0.95, 95% CI 0.88-1.03, p = 0.23). MR Egger (OR 0.93, 95% CI 0.76-1.12, p = 0.44), weighted mode (OR 1.06, 95% CI 0.87-1.29, p = 0.55), simple mode (OR 1.03, 95% CI 0.79-1.34, p = 0.83), and weighted median (OR 0.99, 95% CI 0.89-1.10, p = 0.90) all produced results in line with IVW. According to the IVW technique, UC (OR 1.02, 95% CI 0.95-1.10, p = 0.62) and CD (OR 0.97, 95% CI 0.90-1.04, p = 0.36) did not appear to be associated with VLU in subtype analyses.

conclusionThe MR investigation found no genetic evidence to support a causal relationship between IBD and VLU. This finding clarifies that observed clinical associations are unlikely to be driven by shared genetics, and this genetic insight helps refine the clinical assessment of VLU in patients with IBD.

Indexed as

Inflammatory Bowel DiseasesMendelian Randomization AnalysisVaricose UlcerCrohn DiseaseGenetic Predisposition to DiseaseGenome-Wide Association StudyHumansPolymorphism, Single NucleotideCrohn’s diseaseinflammatory bowel diseaseulcerative colitisvenous leg ulcers

Identifiers

PMID41811798
PMCPMC13580783

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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.