{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T09:11:09Z","timestamp":1791364269161,"version":"4.3.1"},"reference-count":29,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2021,5,27]],"date-time":"2021-05-27T00:00:00Z","timestamp":1622073600000},"content-version":"vor","delay-in-days":26,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000272","name":"National Institute for Health Research","doi-asserted-by":"publisher","award":["RP-PG-1210-12009"],"award-info":[{"award-number":["RP-PG-1210-12009"]}],"id":[{"id":"10.13039\/501100000272","id-type":"DOI","asserted-by":"publisher"}]},{"name":"NHS"},{"DOI":"10.13039\/100006662","name":"NIHR","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006662","id-type":"DOI","asserted-by":"publisher"}]},{"name":"NHS Digital"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,5,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>The aim of this study was to use recent evidence to investigate and update volume\u2013outcome relationships after open surgical repair (OSR) and endovascular repair (EVAR) of abdominal aortic aneurysm in England.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Hospital Episode Statistics (HES) data from April 2006 to March 2018 were obtained. The primary outcome was in-hospital death. Other outcomes included duration of hospital stay, readmissions within 30\u2009days, and critical care requirements. Case-mix adjustment included age, sex, HES year, deprivation index, weekend admission, mode of admission, type of procedure and co-morbidities.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>Annual volume of all repairs combined appeared to be an appropriate measure of volume. After case-mix adjustment, a significant relationship between volume and in-hospital mortality was seen for OSR (P\u00a0&amp;lt;\u20090\u00b7001) but not for EVAR (P\u00a0=\u20090\u00b7169 for emergency and P\u00a0=\u20090\u00b7363 for elective). The effect appeared to extend beyond 60 repairs per year to volumes above 100 repairs per year. There was no significant relationship between volume and duration of hospital stay or 30-day readmissions. In patients receiving emergency OSR, higher volume was associated with longer stay in critical care.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>Higher annual all-procedure volumes were associated with significantly lower in-hospital mortality for OSR, but such a relationship was not significant for EVAR. There was not enough evidence for a volume effect on other outcomes.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1002\/bjs.11919","type":"journal-article","created":{"date-parts":[[2022,11,16]],"date-time":"2022-11-16T15:40:02Z","timestamp":1668613202000},"page":"521-527","source":"Crossref","is-referenced-by-count":21,"title":["Volume\u2013outcome relationships in open and endovascular repair of abdominal aortic aneurysm: administrative data 2006\u20132018"],"prefix":"10.1093","volume":"108","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9307-6850","authenticated-orcid":false,"given":"T","family":"Tong","sequence":"first","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5707-2430","authenticated-orcid":false,"given":"A","family":"Aber","sequence":"additional","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J","family":"Chilcott","sequence":"additional","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P","family":"Thokala","sequence":"additional","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S J","family":"Walters","sequence":"additional","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R","family":"Maheswaran","sequence":"additional","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S","family":"Nawaz","sequence":"additional","affiliation":[{"name":"Sheffield Vascular Institute, Sheffield Teaching Hospitals, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S","family":"Thomas","sequence":"additional","affiliation":[{"name":"Sheffield Vascular Institute, Sheffield Teaching Hospitals, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3422-7102","authenticated-orcid":false,"given":"J","family":"Michaels","sequence":"additional","affiliation":[{"name":"School of Health and Related Research, University of Sheffield, Sheffield , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2021,5,26]]},"reference":[{"key":"2023063010542564800_znaa179-bib1","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/j.ejvs.2016.10.007","article-title":"Procedure volume and the association with short-term mortality following abdominal aortic aneurysm repair in European populations: a systematic review","volume":"53","author":"Phillips","year":"2017","journal-title":"Eur J Vasc Endovasc Surg"},{"key":"2023063010542564800_znaa179-bib2","doi-asserted-by":"crossref","first-page":"644","DOI":"10.1002\/hec.3051","article-title":"The volume-outcome relationship and minimum volume standards\u00a0\u2013\u00a0empirical evidence for Germany","volume":"24","author":"Hentschker","year":"2015","journal-title":"Health Econ"},{"key":"2023063010542564800_znaa179-bib3","doi-asserted-by":"crossref","first-page":"32","DOI":"10.1007\/s00772-014-1401-3","article-title":"Twelve years of the quality assurance registry on ruptured and non-ruptured abdominal aortic aneurysms of the German Vascular Society (DGG). 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