Evidence map›Paper›PMID 34258665›Full record

SynthesisHepatology international2021

Survival analysis between laparoscopic and open hepatectomy for hepatocellular carcinoma: a meta-analysis based on reconstructed time-to-event data.

Qiang Sun, Xiangda Zhang, Xueyi Gong, Zhipeng Hu, Qiao Zhang, Weiming He, Xiaojian Chang, Zemin Hu, Yajin Chen

Abstract readMeta-Analysis
PubMed Publisher
In one paragraph

Synthesis in Hepatology international, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 17% 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

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 15 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  7. Review
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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

9 authors at 6 institutions in 2 countries.

Qiang Sun *General Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Xiangda Zhang *School of Public Health and Preventive Medicine, Monash University, Clayton, Australia.
Xueyi GongGeneral Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Zhipeng HuGeneral Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Qiao ZhangGeneral Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Weiming HeGeneral Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Xiaojian ChangGeneral Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Zemin HuGeneral Surgery Dept. 1, Zhongshan People's Hospital, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China.
Yajin ChenDepartment of Hepatobiliary Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China. ccyj0509@126.com.
Sun Yat-sen University · CNMonash University · AUSun Yat-sen Memorial Hospital · CNThe First Affiliated Hospital, Sun Yat-sen University · CNZhongshan Hospital · CNZhongshan People's Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background/purpose of the studyLaparoscopic hepatectomy (LH) has been widely used in the treatment of hepatocellular carcinoma (HCC). It is generally believed that the long-term outcomes of LH are not inferior to open hepatectomy (OH). However, the quality of evidence is low. The purpose of this study was to reconstruct time-to-event data for meta-analysis based on Kaplan-Meier curves from propensity-score matched studies and compare survival rates following LH and OH for hepatocellular carcinoma.

methodsAll published propensity-score matched studies reported in English that compared LH and OH for hepatocellular carcinoma with Kaplan-Meier curves were screened. Patients' survival information was reconstructed with the aid of a computer vision program. Different models (fixed-effects model for two-stage survival analysis and Cox regression for one-stage survival analysis) were performed for sensitivity analysis. In addition to the primary meta-analysis, two specific subgroup analyses were performed on patients by types of resection, cirrhosis status.

resultsTime-to-event data were extracted from 45 propensity-score matched studies (N = 8905). According to the time-to-event data and the reconstructed Kaplan-Meier curves, the cumulative overall survival rate was 49.0% and 50.9% in the LH and OH cohorts, respectively, a log-rank test did not demonstrate statistical significance (p > 0.05). The cumulative recurrence-free survival (RFS) probability was both close to 0.0%. The median RFS time was 49.1 (95% CI 46.1 ~ 51.7) and 44.3 (95% CI 41 ~ 46.1) months. The difference in disease status was statistically significant by the Log-rank test (p < 0.05). Using the random-effects model of two-stage analysis, the minor hepatectomy subgroup (HR = 1.32, 95% CI [1.09, 1.55], I

conclusionThis study was the first reconstructed time-to-event data based on a high-quality propensity-score matching study to compare the survival outcomes of LH and OH in the treatment of HCC. Results suggested that LH can improve RFS in patients with HCC undergoing minor hepatectomy and may also benefit long-term RFS in overall patients.

Indexed as

Carcinoma, HepatocellularLaparoscopyLiver NeoplasmsHepatectomyHumansRetrospective StudiesSurvival AnalysisSurvival RateTreatment OutcomeHepatocellular carcinomaLaparoscopic hepatectomyOpen hepatectomy

Identifiers

PMID34258665
OpenAlexW3180091450

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.