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ArticleTherapeutic innovation & regulatory science2024

Preventive Effects of Bioabsorbable Anti-Adhesion Barriers on Bowel Obstruction After Colectomy in Colon Cancer Patients: A Retrospective Cohort Study Using an Insurance Claims Database.

Risa Iwata, Shuichi Mochizuki, Tomoaki Hasegawa, Kensuke Ishii, Naoki Matsumaru, Katsura Tsukamoto

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Article in Therapeutic innovation & regulatory science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

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

  1. Adhesion barriers in gynecologic surgeries and cesarean section: An Asia-Pacific expert panel consensus recommendation.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2025
    Pooled it
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4 · The record

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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.

Risa IwataGlobal Regulatory Science, Gifu Pharmaceutical University, Gifu, Japan. iwata-risa@pmda.go.jp.ORCID 0009-0001-8814-0563
Shuichi MochizukiMedical Device Unit, Pharmaceuticals and Medical Devices Agency, Kasumigaseki 3-3-2, Chiyoda-ku, 100-0013, Tokyo, Japan.
Tomoaki HasegawaDivision of Pharmacoepidemiology, Pharmaceuticals and Medical Devices Agency, Tokyo, Japan.
Kensuke IshiiMedical Device Unit, Pharmaceuticals and Medical Devices Agency, Kasumigaseki 3-3-2, Chiyoda-ku, 100-0013, Tokyo, Japan.
Naoki MatsumaruGlobal Regulatory Science, Gifu Pharmaceutical University, Gifu, Japan.
Katsura TsukamotoGlobal Regulatory Science, Gifu Pharmaceutical University, Gifu, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePostoperative adhesions can be prevented by the use of bioabsorbable anti-adhesion barriers. Although the occurrence of postoperative bowel obstruction is an important concern for patients, at the time of approval of anti-adhesion barriers, its effectiveness in preventing postoperative bowel obstruction had not been evaluated. We aimed to retrospectively evaluate the incidence of bowel obstruction after colectomy in patients with colon cancer using an insurance claims database.

methodsThis retrospective cohort study analyzed the data of colon cancer patients (between 2005 and 2017 from a national insurance claims database) who underwent colectomies to compare the proportion of individuals with postoperative bowel obstruction between the barrier and no barrier groups.

resultsOf the 587 patients who met the inclusion criteria, 308 and 279 patients were identified as the barrier and no barrier groups, respectively. The incidence of postoperative bowel obstruction was significantly lower in the barrier group (log-rank test, P = 0.0483). The cumulative incidence of postoperative bowel obstruction 37 months after the initial colectomy was 6.1% and 10.9% in the barrier and no barrier groups, respectively. Moreover, consistent results were obtained in the matched cohort.

conclusionIn colectomies for patients with colon cancer, the use of anti-adhesion barriers could significantly reduce the incidence of postoperative bowel obstruction. Evaluations using insurance claims databases could provide important information on outcomes following implementation of medical devices.

Indexed as

ColectomyColonic NeoplasmsDatabases, FactualIntestinal ObstructionPostoperative ComplicationsAbsorbable ImplantsAdultAgedFemaleHumansIncidenceMaleMiddle AgedRetrospective StudiesTissue AdhesionsAnti-adhesion barriersBowel obstructionColectomyPostoperative adhesionsReal-world data

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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.