Volume–outcome relationships in open and endovascular repair of abdominal aortic aneurysm: administrative data 2006–2018

Abstract Background The aim of this study was to use recent evidence investigate and update volume–outcome relationships after open surgical repair (OSR) endovascular (EVAR) abdominal aortic aneurysm in England. Methods Hospital Episode Statistics (HES) data from April 2006 March 2018 were obtained. primary outcome in-hospital death. Other outcomes included duration hospital stay, readmissions within 30 days, critical care requirements. Case-mix adjustment age, sex, HES year, deprivation index, weekend admission, mode type procedure co-morbidities. Results Annual volume all repairs combined appeared be an appropriate measure volume. After case-mix adjustment, a significant relationship between mortality seen for OSR (P < 0·001) but not EVAR = 0·169 emergency P 0·363 elective). effect extend beyond 60 per year volumes above 100 year. There no stay or 30-day readmissions. In patients receiving OSR, higher associated with longer care. Conclusion Higher annual all-procedure significantly lower such EVAR. enough on other outcomes.