Outcomes of aortic aneurysm surgery in England: a nationwide cohort study using hospital admissions data from 2002 to 2015

Table 6 Comparison of elective infra-renal AA repairs from HES and NVR

Year	2009	2010	2011	2012	2013	Total
NVR cases	4332	4283	4451	4428	4121	21,615
HES cases (Based on the algorithms described in this study)	4666	4441	4743	4631	4603	23,084
% NVR/HES	93%	96%	94%	96%	90%	94%

*NVR collect data in England, Wales, Scotland and Northern Ireland, HES data only cover English hospitals that constitute the majority of the activity. Therefore the missing data from NVR are likely to be higher

ISSN: 1472-6963