Evidence map›Paper›PMID 21699818›Full record

ArticleClinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association2011

The appendix may protect against Clostridium difficile recurrence.

Gene Y Im, Rani J Modayil, Cheng T Lin, Steven J Geier, Douglas S Katz, Martin Feuerman, James H Grendell

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Article in Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
–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

44 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Appendicitis.Nature reviews. Disease primers · 2025
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  13. Review
  14. Mucosal Immunity and the Gut-Microbiota-Brain-Axis in Neuroimmune Disease.International journal of molecular sciences · 2022
    Review
  15. Article
  16. Review
  17. Patients withWorld journal of gastrointestinal surgery · 2021
    Article
  18. Article
  19. Article
  20. Appendectomy and Non-TyphoidalJournal of clinical medicine · 2021
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Gene Y ImDepartment of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Winthrop-University Hospital, Mineola, New York 11501, USA.
Rani J Modayil
Cheng T Lin
Steven J Geier
Douglas S Katz
Martin Feuerman
James H Grendell

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND &

aimsSeveral risk factors have been identified for the development of recurrent Clostridium difficile infection (CDI) that alter host immunity and disrupt colonic flora. Although the function of the appendix has been debated, its active, gut-associated lymphoid tissue and biofilm production indicate potential roles in recovery from initial CDI and protection against recurrent CDI. We investigated whether the presence or absence of an appendix is associated with CDI recurrence.

methodsWe reviewed the medical records of adult inpatients with CDI who were admitted to a tertiary-care teaching hospital from 2005 to 2007 to identify those with and without an appendix. The primary dependent variable for statistical analysis was CDI recurrence.

resultsIn a multivariate analysis of 11 clinical variables, the presence of an appendix was associated inversely with CDI recurrence (P < .0001; adjusted relative risk, .398). Age older than 60 years also was associated with CDI recurrence (P = .0280; adjusted relative risk, 2.44).

conclusionsThe presence of an appendix has a significant and independent, inverse association with CDI recurrence, but this finding requires validation in a prospective study. Assessing the presence or absence of an appendix might be useful in predicting CDI recurrence.

Indexed as

AdultAgedAged, 80 and overAppendixClostridioides difficileClostridium InfectionsFemaleHumansMaleMiddle AgedPrevalenceSecondary PreventionStatistics as Topic

Identifiers

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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.