Evidence map›Paper›PMID 33534051›Full record

ArticleJournal of cancer research and clinical oncology2021

Survival benefit of conversion surgery after intensive chemotherapy for unresectable metastatic gastric cancer: a propensity score-matching analysis.

Hiroyuki Ohnuma, Yasushi Sato, Naoki Onoyama, Kota Hamaguchi, Naotaka Hayasaka, Masanori Sato, Kazuyuki Murase, Kohichi Takada, Koji Miyanishi, Takeshi Murakami and 4 more

Abstract read
In one paragraph

Article in Journal of cancer research and clinical oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing 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

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

  1. Pooled it
  2. Pooled it
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  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Overview of Chemotherapy for Gastric Cancer.Journal of clinical medicine · 2023
    Review
  11. 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

14 authors.

Hiroyuki OhnumaDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.ORCID http://orcid.org/0000-0002-4350-6971
Yasushi SatoDepartment of Community Medicine for Gastroenterology and Oncology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan.
Naoki OnoyamaDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Kota HamaguchiDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Naotaka HayasakaDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Masanori SatoDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Kazuyuki MuraseDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Kohichi TakadaDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Koji MiyanishiDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan.
Takeshi MurakamiDepartment of Surgery, Surgical Oncology and Science, Sapporo Medical University School of Medicine, Sapporo, Japan.
Tatsuya ItoDepartment of Surgery, Surgical Oncology and Science, Sapporo Medical University School of Medicine, Sapporo, Japan.
Takayuki NobuokaDepartment of Surgery, Surgical Oncology and Science, Sapporo Medical University School of Medicine, Sapporo, Japan.
Ichiro TakemasaDepartment of Surgery, Surgical Oncology and Science, Sapporo Medical University School of Medicine, Sapporo, Japan.
Junji KatoDepartment of Medical Oncology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, 060-0061, Japan. jkato@sapmed.ac.jp.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe clinical benefit of conversion surgery (CS) for unresectable gastric cancer (GC), whereby unresectable GC responds to chemotherapy and subsequently receives curative-intent surgery, remains unclear. Here, we aimed to clarify the clinical value of CS.

methodsIn this retrospective cohort study, we analyzed 175 unresectable GC, who received triple combined chemotherapy between 2004 and 2019. We divided patients into two groups: those who underwent CS and those receiving chemotherapy only (CS and C groups, respectively). Propensity score matching was used to minimize confounding bias.

resultsOf 175 cases, 61 (34.9%) underwent CS. R0 resection was obtained in 85.2%. After matching, 44 pairs were selected; there were no significant differences in baseline covariants. Group CS had a significantly better median overall survival (OS) (18.8 vs. 46.0 months, p < 0.001), and prolonged progression-free survival (7.4 vs. 25.8 months, p < 0.001). Subgroup analysis of OS showed a favorable trend for CS for almost all subgroups. Multivariate analysis revealed that good ECOG performance status and CS were associated with a longer OS.

conclusionThe survival benefit of CS was consistently demonstrated in the univariate and multivariate analysis, even in the matched cohort. Additional large-scale trials are needed for further validation.

Indexed as

AdenocarcinomaGastrectomyStomach NeoplasmsAdultAgedAntineoplastic Combined Chemotherapy ProtocolsChemotherapy, AdjuvantCohort StudiesCombined Modality TherapyFemaleHumansMaleMiddle AgedNeoplasm MetastasisPropensity ScoreRetrospective StudiesChemotherapyConversion surgeryConversion therapyGastric cancerPropensity score

Identifiers

PMID33534051
PMCPMC11802134

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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.