Risk adjusted in-hospital mortality following elective infra-renal AAA repair

What this data shows:

Shows how many procedures have been performed by the NHS Trust or surgeon over the five year time period.

How the data is gathered:

This number is only based on elective AAA repairs where the aneurysm was infra-renal (below the level of the kidneys). No complex elective AAA repairs or are included, nor are emergency repairs for ruptured aneurysms.

When the data is shown:

It is normal for different clinicians and units to have different results and there is an expected range results can fall in. Sometimes results may fall outside the expected range, which could be an indication that the care provided is either significantly poorer or significantly better than expected. But sometimes these results just happen by chance. Detecting whether a result falls outside the expected range by change or because of a significant reason can be challenging. We want to reduce the times when we identify a unit or individuals results as being outside of the expected range just because of chance.

We can do this by using a wide definition of the expected range. The narrower the definition of the expected range the greater the chance of a result being labelled as outside of it just because of chance.

Audits participating in publication on NHS.uk and My NHS are asked to use statistical analysis to do this.

Where we are able to identify a unit or individuals results as being significantly outside of the expected range using a wide definition, we will show this on the site. We don’t show units or individuals as being outside of the expect range using a narrower definition.

More information about the data source:

Only records that were submitted on the NVR by the data submission deadline are included.

Data Source:

National Vascular Registry

Data Period:

01/01/2015 – 31/12/2017

Further Information:

http://www.vsqip.org.uk/surgeon-outcomes/