Evidence map›Paper›PMID 34637042›Full record

ArticleGastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association2022

Safe implementation of robotic gastrectomy for gastric cancer under the requirements for universal health insurance coverage: a retrospective cohort study using a nationwide registry database in Japan.

Koichi Suda, Hiroyuki Yamamoto, Tatsuto Nishigori, Kazutaka Obama, Yukie Yoda, Makoto Hikage, Susumu Shibasaki, Tsuyoshi Tanaka, Yoshihiro Kakeji, Masafumi Inomata and 5 more

Abstract read
In one paragraph

Article in Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 2 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

38 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Robotic gastrectomy for gastric cancer: systematic review and future directions.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2023
    Pooled it
  3. Intraoperative corticosteroid administration for resectable gastric cancer: a multicenter, randomized, open-label, phase II/III study.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2025
    Trial
  4. Article
  5. Clinical advantages of robotic gastrectomy for gastric cancer over conventional laparoscopic approach: a retrospective cohort study using a nationwide registry database in Japan.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2026
    Article
  6. Artificial intelligence-based anatomical recognition improves surgeon decision-making during robotic gastrectomy.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2026
    Article
  7. Article
  8. Article
  9. Article
  10. Impact of prophylactic drain placement on intra-abdominal infections after gastrectomy: nationwide inpatient database study in Japan.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2026
    Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Review
  16. Article
  17. Article
  18. Review
  19. Clinical epidemiology of the endoscopic, laparoscopic, and surgical resection of malignant gastric tumors in Japan, 2014-2021: a retrospective study using open data from a national claims database.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2025
    Observational
  20. 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

15 authors.

Koichi SudaDepartment of Surgery, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. ko-suda@nifty.com.ORCID http://orcid.org/0000-0002-0423-1565
Hiroyuki YamamotoDepartment of Healthcare Quality Assessment, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Tatsuto NishigoriDepartment of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Kazutaka ObamaDepartment of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Yukie YodaDepartment of Surgery, Saga University Faculty of Medicine, Saga, Japan.
Makoto HikageDivision of Gastric Surgery, Shizuoka Cancer Center, Shizuoka, Japan.
Susumu ShibasakiDepartment of Surgery, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan.
Tsuyoshi TanakaCollaborative Laboratory for Research and Development in Advanced Surgical Technology, Fujita Health University, Toyoake, Japan.
Yoshihiro KakejiDatabase Committee, The Japanese Society of Gastroenterological Surgery, Tokyo, Japan.
Masafumi InomataAcademic Committee, The Japan Society for Endoscopic Surgery, Tokyo, Japan.
Yuko KitagawaThe Japanese Society of Gastroenterological Surgery, Tokyo, Japan.
Hiroaki MiyataDepartment of Healthcare Quality Assessment, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Masanori TerashimaDivision of Gastric Surgery, Shizuoka Cancer Center, Shizuoka, Japan.
Hirokazu NoshiroDepartment of Surgery, Saga University Faculty of Medicine, Saga, Japan.
Ichiro UyamaCollaborative Laboratory for Research and Development in Advanced Surgical Technology, Fujita Health University, Toyoake, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRobotic gastrectomy (RG) has increased since being covered by universal health insurance in 2018. However, to ensure patient safety the operating surgeon and facility must meet specific requirements. We aimed to determine whether RG has been safely implemented under the requirements for universal health insurance in Japan.

methodsData of consecutive patients with primary gastric cancer who underwent minimally invasive total or distal gastrectomy-performed by a surgeon certified by the Japan Society for Endoscopic Surgery (JSES) endoscopic surgical skill qualification system (ESSQS) between October 2018 and December 2019-were extracted from the gastrointestinal surgery section of the National Clinical Database (NCD). The primary outcome was morbidity over Clavien-Dindo classification grade IIIa. Patient demographics and hospital volume were matched between RG and laparoscopic gastrectomy (LG) using propensity score-matched analysis (PSM), and the short-term outcomes of RG and LG were compared.

resultsAfter PSM, 2671 patients who underwent RG and 2671 who underwent LG were retrieved (from a total of 9881), and the standardized difference of all the confounding factors reduced to 0.07 or less. Morbidity rates did not differ between the RG and LG patients (RG, 4.9% vs. LG, 3.9%; p = 0.084). No difference was observed in 30-day mortality (RG, 0.2% vs. LG, 0.1%; p = 0.754). The reoperation rate was greater following RG (RG, 2.2% vs. LG, 1.2%; p = 0.004); however, the duration of postoperative hospitalization was shorter (RG, 10 [8-13] days vs. LG, 11 [9-14] days; p < 0.001).

conclusionsInsurance-covered RG has been safely implemented nationwide.

Indexed as

LaparoscopyRobotic Surgical ProceduresStomach NeoplasmsGastrectomyHumansJapanPostoperative ComplicationsRegistriesRetrospective StudiesTreatment OutcomeUniversal Health InsuranceGastrectomyMinimally invasive surgical proceduresPostoperative complicationsRobotic surgical procedureStomach neoplasms

Identifiers

PMID34637042
PMCPMC8505217

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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.