Evidence map›Paper›PMID 25595310›Full record

Observational studyJournal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract2015

Effect of hospital volume on outcomes of laparoscopic appendectomy for acute appendicitis: an observational study.

Atsuhiko Murata, Toshihiko Mayumi, Keiji Muramatsu, Makoto Ohtani, Shinya Matsuda

Abstract readObservational Study
PubMed Publisher
In one paragraph

Observational study in Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Laparoscopic Versus Open Appendectomy for Acute Appendicitis in Children: a Nationwide Retrospective Study on Postoperative Outcomes.Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract · 2021
    Article
  6. Article
  7. 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

5 authors.

Atsuhiko MurataDepartment of Preventive Medicine and Community Health, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan, amurata@med.uoeh-u.ac.jp.
Toshihiko Mayumi
Keiji Muramatsu
Makoto Ohtani
Shinya Matsuda

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThis study investigated the effect of hospital volume on outcomes of laparoscopic appendectomy for acute appendicitis.

methodsIn total, 30,525 patients who underwent laparoscopic appendectomy for acute appendicitis were referred to 825 hospitals in Japan from 2010 to 2012. We compared appendectomy-related complications, length of stay (LOS), and medical costs in relation to hospital volume. For this study period, hospitals were categorized as low-volume hospitals (LVHs, <50 cases), medium-volume hospitals (MVHs, 50-100 cases), or high-volume hospitals (HVHs, >100 cases).

resultsSignificant differences in appendectomy-related complications were observed among the LVHs, MVHs, and HVHs (6.9, 7.2, and 6.0 %, respectively; p = 0.001). Multiple logistic regression revealed that HVHs were associated with a lower relative risk of appendectomy-related complications than were LVHs and MVHs (odds ratio [OR], 0.84; 95 % confidence interval [CI], 0.74-0.95; p = 0.006). Multiple linear regression showed that HVHs were associated with shorter LOS and lower medical costs than were LVHs and MVHs. The unstandardized coefficient for LOS was -0.92 days (95 % CI, -1.07 to -0.78; p < 0.001), whereas that for medical costs was - $167.4 (95 % CI, -256.2 to -78.6; p < 0.001).

conclusionsHospital volume was significantly associated with laparoscopic appendectomy outcomes.

Indexed as

Hospitals, High-VolumeHospitals, Low-VolumeAcute DiseaseAdolescentAdultAgedAged, 80 and overAppendectomyAppendicitisChildFemaleHospital CostsHumansJapanLaparoscopyLength of Stay

Identifiers

PMID25595310

What OpenQuestion holds

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Read underepoch 390

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.