Evidence map›Paper›PMID 34724124›Full record

ArticleAnnals of surgical oncology2022

Determining Hospital Volume Threshold for Safety of Minimally Invasive Pancreaticoduodenectomy: A Contemporary Cutpoint Analysis.

Patricia C Conroy, Lucia Calthorpe, Joseph A Lin, Sarah Mohamedaly, Alex Kim, Kenzo Hirose, Eric Nakakura, Carlos Corvera, Julie Ann Sosa, Ankit Sarin and 3 more

Open access · greenAbstract read
In one paragraph

Article in Annals of surgical oncology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.3field-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

15 citing papers in PubMed, 25 citations in OpenAlex.

  1. Trial
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  4. Hospital volume stratification using stratum-specific likelihood ratios for pancreatectomy.Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract · 2026
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  7. Review
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  11. Initiation of a robotic pancreatoduodenectomy program using virtual collaboration.HPB : the official journal of the International Hepato Pancreato Biliary Association · 2024
    Article
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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

13 authors at 2 institutions in 1 country.

Patricia C ConroyDepartment of Surgery, University of California, San Francisco, San Francisco, CA, USA.
Lucia CalthorpeSchool of Medicine, University of California, San Francisco, San Francisco, CA, USA.
Joseph A LinDepartment of Surgery, University of California, San Francisco, San Francisco, CA, USA.
Sarah MohamedalyDepartment of Surgery, University of California, San Francisco, San Francisco, CA, USA.
Alex KimDepartment of Surgery, Division of Surgical Oncology, The Ohio State University, Columbus, OH, USA.
Kenzo HiroseDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Eric NakakuraDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Carlos CorveraDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Julie Ann SosaDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Ankit SarinDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Kimberly S KirkwoodDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Adnan AlseidiDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA.
Mohamed A AdamDepartment of Surgery, Division of Surgical Oncology, University of California, San Francisco, San Francisco, CA, USA. mohamed.adam@ucsf.edu.
University of California, San Francisco · USThe Ohio State University · US

Funding

NRSA Training CoreTL1TR001871 · NCATS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI KANAYA, ALKA M., SOMSOUK, MA · 2016 to 2025
$10.1M
Filling a Void of Research (FAVOR) Training for Transplant SurgeonsT32AI125222 · NIAID · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI PETER G STOCK, Minnie M Sarwal · 2016 to 2026
$3.4M
Surgical Oncology Training GrantT32CA251070 · NCI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI ESSERMAN, LAURA J · 2020 to 2024
$1.5M
NCATS NIH HHS TL1 TR001871NCI NIH HHS T32 CA251070NCI NIH HHS T32CA25107001NIAID NIH HHS T32 AI125222NIH HHS 5T32AI125222-05
6 · The paper itself

Abstract

backgroundGuidelines recommend limiting minimally invasive pancreaticoduodenectomy (MIPD) to high-volume centers. However, the definition of high-volume care remains unclear. We aimed to objectively define a minimum number of MIPD performed annually per hospital associated with improved outcomes in a contemporary patient cohort. PATIENTS AND

methodsResectable pancreatic adenocarcinoma patients undergoing MIPD were included from the National Cancer Database (2010-2017). Multivariable modeling with restricted cubic splines was employed to identify an MIPD annual hospital volume threshold associated with lower 90-day mortality. Outcomes were compared between patients treated at low-volume (≤ model-identified cutoff) and high-volume (> cutoff) centers.

resultsAmong 3079 patients, 141 (5%) died within 90 days. Median hospital volume was 6 (range 1-73) cases/year. After adjustment, increasing hospital volume was associated with decreasing 90-day mortality for up to 19 (95% CI 16-25) cases/year, indicating a threshold of 20 cases/year. Most cases (82%) were done at low-volume (< 20 cases/year) centers. With adjustment, MIPD at low-volume centers was associated with increased 90-day mortality (OR 2.7; p = 0.002). Length of stay, positive surgical margins, 30-day readmission, and overall survival were similar. On analysis of the most recent two years (n = 1031), patients at low-volume centers (78.2%) were younger and had less advanced tumors but had longer length of stay (8 versus 7 days; p < 0.001) and increased 90-day mortality (7% versus 2%; p = 0.009).

conclusionsThe cutpoint analysis identified a threshold of at least 20 MIPD cases/year associated with lower postoperative mortality. This threshold should inform national guidelines and institution-level protocols aimed at facilitating the safe implementation of this complex procedure.

Indexed as

AdenocarcinomaLaparoscopyPancreatic NeoplasmsHospitalsHumansPancreaticoduodenectomy

Identifiers

PMID34724124
PMCPMC9289437
OpenAlexW3210738622

What OpenQuestion holds

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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.