Evidence map›Paper›PMID 25710790›Full record

ArticlePloS one2015

Association between appendectomy and subsequent colorectal cancer development: an Asian population study.

Shih-Chi Wu, William Tzu-Liang Chen, Chih-Hsin Muo, Tao-Wei Ke, Chu-Wen Fang, Fung-Chang Sung

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed, 4 pooled it
8.8field-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.

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

49 citing papers in PubMed, 4 syntheses or guidelines pooled it, 104 citations in OpenAlex.

  1. Pooled it
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  10. Appendicitis.Nature reviews. Disease primers · 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

6 authors at 4 institutions in 1 country.

Shih-Chi WuTrauma and Emergency Center, China Medical University Hospital, Taichung, Taiwan; School of Medicine, China Medical University, Taichung, Taiwan.
William Tzu-Liang ChenSchool of Medicine, China Medical University, Taichung, Taiwan; Division of Colorectal Surgery, Department of Surgery, China Medical University Hospital, Taichung, Taiwan.
Chih-Hsin MuoManagement Office for Health Data, China Medical University and Hospital, Taichung, Taiwan.
Tao-Wei KeDivision of Colorectal Surgery, Department of Surgery, China Medical University Hospital, Taichung, Taiwan.
Chu-Wen FangDepartment of Surgery, Changhua Christian Hospital, Changhua, Taiwan.
Fung-Chang SungManagement Office for Health Data, China Medical University and Hospital, Taichung, Taiwan; Institute of Clinical Medical Science, China Medical University College of Medicine, Taichung, Taiwan.
China Medical University · TWChina Medical University Hospital · TWChanghua Christian Hospital · TWNational Yang Ming Chiao Tung University · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe appendix may modulate colon microbiota and bowel inflammation. We investigated whether appendectomy alters colorectal cancer risk.

methodsWe identified a cohort of 75,979 patients who underwent appendectomy between 1997 and 1999 based on the insurance claims of Taiwan. A comparison cohort of 303,640 persons without appendectomy was selected randomly, frequency matched by age, sex, comorbidity and entry year was also selected. We monitored subsequent colorectal cancer development in both cohorts.

resultsThe overall colorectal cancer incidence was 14% higher in the appendectomy patients than in the comparison cohort (p <0.05): the highest incidence was observed for rectal cancer, and the lowest incidence was observed for cancer of the cecum-ascending colon for both cohorts. Men were at higher risk than women. Subjects ≥ 60 years had an HR of 12.8 compared to those <60 years. The incidence of colorectal cancer was much higher in 1.5-3.5 years post appendectomy follow-up than for the comparisons (HR of 2.13). Patients who received an incidental appendectomy had an HR of 2.90 when compared to the comparisons.

conclusionsResults of our study suggest that appendectomy in patients with appendicitis is likely associated with the development of colorectal cancer in the post-surgery period.

Indexed as

AdultAgedAge FactorsAppendectomyAppendicitisAsian PeopleCohort StudiesColorectal NeoplasmsDemographyFemaleFollow-Up StudiesHumansMaleMiddle AgedProportional Hazards ModelsRisk Factors

Identifiers

PMID25710790
PMCPMC4339380
OpenAlexW2058676425

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

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.