Evidence map›Paper›PMID 36961323›Full record

SynthesisJournal of Crohn's & colitis2023

Risks Factors Associated with the Development of Crohn's Disease After Ileal Pouch-Anal Anastomosis for Ulcerative Colitis: A Systematic Review and Meta-Analysis.

Michael G Fadel, Georgios Geropoulos, Oliver J Warren, Sarah C Mills, Paris P Tekkis, Valerio Celentano, Christos Kontovounisios

Abstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in Journal of Crohn's & colitis, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Review
  2. Review
  3. Article
  4. Article
  5. Managing Acute Severe Ulcerative Colitis in 2025 and Beyond.Current gastroenterology reports · 2026
    Review
  6. Article
  7. Review
  8. Review
  9. Article
  10. Article
  11. Pouchitis: pathophysiology and management.Nature reviews. Gastroenterology & hepatology · 2024
    Review
  12. 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

7 authors.

Michael G FadelDepartment of Surgery and Cancer, Imperial College London, London, UK.
Georgios GeropoulosDepartment of Colorectal Surgery, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK.
Oliver J WarrenDepartment of Colorectal Surgery, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK.
Sarah C MillsDepartment of Colorectal Surgery, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK.
Paris P TekkisDepartment of Surgery and Cancer, Imperial College London, London, UK.
Valerio CelentanoDepartment of Colorectal Surgery, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK.
Christos KontovounisiosDepartment of Surgery and Cancer, Imperial College London, London, UK.ORCID 0000-0002-1828-1395

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFollowing ileal pouch-anal anastomosis [IPAA] for ulcerative colitis [UC], up to 16% of patients develop Crohn's disease of the pouch [CDP], which is a major cause of pouch failure. This systematic review and meta-analysis aimed to identify preoperative characteristics and risk factors for CDP development following IPAA.

methodsA literature search of the MEDLINE, EMBASE, EMCare and CINAHL databases was performed for studies that reported data on predictive characteristics and outcomes of CDP development in patients who underwent IPAA for UC between January 1990 and August 2022. Meta-analysis was performed using random-effect models and between-study heterogeneity was assessed.

resultsSeven studies with 1274 patients were included: 767 patients with a normal pouch and 507 patients with CDP. Age at UC diagnosis (weighted mean difference [WMD] -2.85; 95% confidence interval [CI] -4.39 to -1.31; p = 0.0003; I2 54%) and age at pouch surgery [WMD -3.17; 95% CI -5.27 to -1.07; p = 0.003; I2 20%) were significantly lower in patients who developed CDP compared to a normal pouch. Family history of IBD was significantly associated with CDP (odds ratio [OR] 2.43; 95% CI 1.41-4.19; p = 0.001; I2 31%], along with a history of smoking [OR 1.80; 95% CI 1.35-2.39; p < 0.0001; I2 0%]. Other factors such as sex and primary sclerosing cholangitis were found not to increase the risk of CDP.

conclusionsAge at UC diagnosis and pouch surgery, family history of IBD and previous smoking have been identified as potential risk factors for CDP post-IPAA. This has important implications towards preoperative counselling, planning surgical management and evaluating prognosis.

Indexed as

Colitis, UlcerativeColonic PouchesCrohn DiseasePostoperative ComplicationsProctocolectomy, RestorativeAge FactorsHumansRisk FactorsCrohn’s disease of the pouchileal pouch–anal anastomosisInflammatory bowel diseaseulcerative colitis

Identifiers

PMID36961323
PMCPMC10588783

What OpenQuestion holds

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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.