{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T14:07:28Z","timestamp":1776262048207,"version":"3.50.1"},"reference-count":23,"publisher":"Springer Science and Business Media LLC","issue":"4","license":[{"start":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T00:00:00Z","timestamp":1773014400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T00:00:00Z","timestamp":1773014400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100005713","name":"Technische Universit\u00e4t M\u00fcnchen","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100005713","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["OBES SURG"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Postoperative 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.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We 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\u20132019-02-28).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Follow-up participation was significantly lower in the COVID-19 group (3-month: 75.3% vs. 82.7%, OR\u2009=\u20090.62; 1-year: 63.7% vs. 71.3%, OR\u2009=\u20090.69; both\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). 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 (\u20130.14;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>During 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 \u2013 on short-term MBS outcomes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s11695-026-08515-6","type":"journal-article","created":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T19:44:45Z","timestamp":1773085485000},"page":"1503-1509","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Impact of the COVID-19 Pandemic on Weight Loss and Quality of Life One Year Post Metabolic Bariatric Surgery"],"prefix":"10.1007","volume":"36","author":[{"given":"Michael","family":"Hanselmann","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sophie","family":"Merzweiler","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ren\u00e9e","family":"Stark","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ann-Cathrin","family":"Koschker","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carsten","family":"Klinger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miljana","family":"Vladimirov","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Florian","family":"Seyfried","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bettina","family":"Zippel-Schultz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin","family":"Fassnacht","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Laxy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2026,3,9]]},"reference":[{"issue":"5","key":"8515_CR1","doi-asserted-by":"publisher","DOI":"10.1111\/cob.12386","volume":"10","author":"JP Almandoz","year":"2020","unstructured":"Almandoz JP, Xie L, Schellinger JN, Mathew MS, Gazda C, Ofori A, et al. 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All patients provided written informed consent before registry entry, and each participating German hospital has obtained institutional review board approval before participation. The informed consent and data safety concept was approved by the Society for Technology, Methods, and Infrastructure for Networked Medical Research (http:\/\/www.tmf-ev.de ), and publication guidelines were established by the DGAV (http:\/\/www.dgav.de\/studoq\/datenschutzkonzept-und-publikationsrichtlinien.html ). Data extraction was performed after formal application and a positive vote of the registry steering committee.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"<!--Emphasis Type='Bold' removed-->Statement of Ethics"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing Interests"}}]}}