Evidence map›Paper›PMID 41803375›Full record

ArticleObesity surgery2026

The Impact of the COVID-19 Pandemic on Weight Loss and Quality of Life One Year Post Metabolic Bariatric Surgery.

Michael Hanselmann, Sophie Merzweiler, Renée Stark, Ann-Cathrin Koschker, Carsten Klinger, Miljana Vladimirov, Florian Seyfried, Bettina Zippel-Schultz, Martin Fassnacht, Michael Laxy

Abstract readMulticenter Study
In one paragraph

Article in Obesity surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

10 authors.

Michael HanselmannSchool of Medicine and Health, Technical University of Munich, Munich, Germany. michael.hanselmann@tum.de.
Sophie MerzweilerSchool of Medicine and Health, Technical University of Munich, Munich, Germany.
Renée StarkSchool of Medicine and Health, Technical University of Munich, Munich, Germany.
Ann-Cathrin KoschkerDepartment of Internal Medicine I, University of Würzburg, Wurzburg, Germany.
Carsten KlingerGerman society for general and visceral surgery (DGAV), Berlin, Germany.
Miljana VladimirovMedical School and University Medical Center Ostwestfalen-Lippe, Bielefeld University, Bielefeld, Germany.
Florian SeyfriedInterdisciplinary Obesity Centre, University of Würzburg, Wurzburg, Germany.
Bettina Zippel-SchultzDepartment Innovation in Health Care, German Foundation for the Chronically Ill, Berlin, Germany.
Martin FassnachtDepartment of Internal Medicine I, University of Würzburg, Wurzburg, Germany.
Michael LaxySchool of Medicine and Health, Technical University of Munich, Munich, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionPostoperative follow-up care after metabolic bariatric surgery (MBS) is considered essential to achieve optimal outcomes. These follow-up care pathways were partially disrupted during the COVID-19 pandemic. Our objective was to investigate whether the COVID-19 pandemic and in particular the first (spring 2020) and the second wave (winter 2020/2021) had an impact on short-term outcomes of MBS in Germany.

methodsWe analyzed data of 5,859 patients from 154 bariatric centers across Germany. Our predefined endpoints were percentage total weight loss (%TWL), bariatric quality of life (BQL), prevalence of type 2 diabetes (T2D), hypertension 1-year post-surgery and follow-up participation 3 months and 1 year post surgery. We compared these outcomes for MBS patients affected by the COVID-19 pandemic between 2019-12-01 and 2020-02-29 (COVID-19 group) with a corresponding control group that was not affected by the pandemic (No-COVID-19 group; surgery: 2018-12-01-2019-02-28).

resultsFollow-up participation was significantly lower in the COVID-19 group (3-month: 75.3% vs. 82.7%, OR = 0.62; 1-year: 63.7% vs. 71.3%, OR = 0.69; both p < 0.001). Among patients attending the 1-year follow-up, %TWL, T2D, and hypertension rates did not differ significantly. However, BQL was slightly lower in the COVID-19 group (-0.14; p < 0.001).

conclusionsDuring the first and second wave of the COVID-19 pandemic frequency of follow-up visits after MBS was reduced in Germany. For those who participated, the quality of life was slightly reduced while all other outcomes were comparable. Our findings contribute to a better understanding of the impact of the COVID-19 pandemic - and lockdown measures in general - on short-term MBS outcomes.

Indexed as

Bariatric SurgeryCOVID-19Obesity, MorbidQuality of LifeWeight LossAdultDiabetes Mellitus, Type 2FemaleFollow-Up StudiesGermanyHumansHypertensionMaleMiddle AgedPandemicsSARS-CoV-2

Identifiers

PMID41803375
PMCPMC13083447

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LicenceCC BY
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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.