Evidence map›Paper›PMID 34836280›Full record

Trial reportNutrients2021

Short-Term Pre-Operative Protein Caloric Restriction in Elective Vascular Surgery Patients: A Randomized Clinical Trial.

Peter Kip, Thijs J Sluiter, Jodene K Moore, Abby Hart, Jack Ruske, James O'Leary, Jonathan Jung, Ming Tao, Michael R MacArthur, Patrick Heindel and 6 more

Open access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Nutrients, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.1field-weighted citation impact, top 23% 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

5 citing papers in PubMed, 11 citations in OpenAlex.

  1. Dietitian-led very low-calorie diet for preoperative rehabilitation in patients with obesity awaiting non-bariatric elective laparoscopic surgery: A retrospective study.Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition · 2026
    Article
  2. 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

16 authors at 3 institutions in 4 countries.

Peter KipDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
Thijs J SluiterDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.ORCID 0000-0003-0199-2729
Jodene K MooreDepartment of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.ORCID 0000-0001-8281-1234
Abby HartDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
Jack RuskeDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.ORCID 0000-0002-1005-1544
James O'LearyDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
Jonathan JungDepartment of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.ORCID 0000-0003-0674-9066
Ming TaoDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
Michael R MacArthurDepartment of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.ORCID 0000-0003-3593-6995
Patrick HeindelDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.ORCID 0000-0001-6030-6923
Alwin de JongEinthoven Laboratory for Experimental Vascular Medicine, Department of Surgery, Leiden University Medical Center, 2333 ZC Leiden, The Netherlands.ORCID 0000-0002-4556-5393
Margreet R de VriesEinthoven Laboratory for Experimental Vascular Medicine, Department of Surgery, Leiden University Medical Center, 2333 ZC Leiden, The Netherlands.ORCID 0000-0002-3648-9130
M Furkan BurakDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
Sarah J MitchellDepartment of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
James R MitchellDepartment of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
C Keith OzakiDepartment of Surgery and the Heart and Vascular Center, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
Brigham and Women's Hospital · USHarvard University · USLeiden University Medical Center · NL

Funding

The Role of the Glucose-regulated Protein GRP78/BiP in Stress Resistance and AginP01AG034906 · NIA · UNIVERSITY OF SOUTHERN CALIFORNIA · PI LONGO, VALTER D. · 2011 to 2016
$9.3M
American Heart Association 16GRNT27090006American Heart Association #19POST34400059Charoen Pokphand Group n/aDe Drie Lichten Foundation n/aF31 F31AG064863-01Foundation for the National Institutes of Health 1R01HL133500Michael- van Vloten Foundation n/aNational Institute of Health AG036712, DK090629NIA NIH HHS P01AG034906Prins Bernhard Cultural Foundation n/a
6 · The paper itself

Abstract

(1) Background: Vascular surgery operations are hampered by high failure rates and frequent occurrence of peri-operative cardiovascular complications. In pre-clinical studies, pre-operative restriction of proteins and/or calories (PCR) has been shown to limit ischemia-reperfusion damage, slow intimal hyperplasia, and improve metabolic fitness. However, whether these dietary regimens are feasible and safe in the vascular surgery patient population remains unknown. (2) Methods: We performed a randomized controlled trial in patients scheduled for any elective open vascular procedure. Participants were randomized in a 3:2 ratio to either four days of outpatient pre-operative PCR (30% calorie, 70% protein restriction) or their regular ad-libitum diet. Blood was drawn at baseline, pre-operative, and post-operative day 1 timepoints. A leukocyte subset flow cytometry panel was performed at these timepoints. Subcutaneous/perivascular adipose tissue was sampled and analyzed. Follow-up was one year post-op. (3) Results: 19 patients were enrolled, of whom 11 completed the study. No diet-related reasons for non-completion were reported, and there was no intervention group crossover. The PCR diet induced weight loss and BMI decrease without malnutrition. Insulin sensitivity was improved after four days of PCR (

Indexed as

AgedCaloric RestrictionCytokinesDietDiet TherapyEnergy IntakeExerciseFemaleGlucoseHomeostasisHumansImmunityMaleMiddle AgedProteinsVascular Surgical ProceduresCytokinesGlucoseProteinsdietary restrictionmetabolic fitnessvascular surgery

Identifiers

PMID34836280
PMCPMC8621550
OpenAlexW3211535770

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.