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Summary & Timescale of the Data

The data collection period was from 1 January 2017 to 31 December 2019.

5984 procedures were recorded from 189 consultants at 121 centres in the United Kingdom, including 210 private patients from 46 consultants. Ten of the consultants returning data are not BAUS members.

Hospital Episode Statistics (HES) for 2017 to 2019 indicate that there were 5,949 PCNL cases in England. We do not believe that HES data accurately record the total number of procedures undertaken, as we are aware there are differences in the way this procedure is coded by different units. However, we do think we have received a very good response from the surgeons undertaking this procedure, and we estimate that we have collected data on about 85 - 90% of the procedures undertaken in England during  time period 2017 to 2019 inclusively.  

  • Median number of cases per consultant: 23 (range 1 - 152)
  • Median number of cases per centre:  33 (range 1 - 258)

All data were entered by hand; there was no bulk uploading of data from other systems.

It is also important to note that as a result of the COVID-19 crisis some surgeons and units may have been unable to submit all or any of their 2019 data.


Timeline for 2017 to 2019 data

24 Feb 2020 Deadline for submission of data to BAUS
6 Mar 2020 Summaries of data returned to Consultant contributors for validation
20 Apr 2020 Final deadline for corrections and additional data
3 May 2020 Data extracted from the web-based database. Once extracted, the data was transferred to a Microsoft Access™ database for validation before being imported into Tableau™ for generation of the analyses
12 May 2020 All contributing surgeons sent a link to the website so they could check exactly how their data would be presented
29 May 2020 Data live to the public