The information on surgical outcomes for the English NHS trusts was derived from data on patients diagnosed with oesophageal or stomach cancer between 1 April 2015 and 31 March 2018 (three years of data). For the individual surgeons, the information was produced from the five years between 1 April 2013 and 31 March 2018. The patient information was submitted by hospital staff to the Audit via a secure, web-based data collection system and, for most patients, the Audit received complete data on their disease and the variety of treatments given. Information on whether a patient died after surgery was obtained from the surgeons and from the Office for National Statistics (ONS) death register.
For further details about how the audit collects patient information, please visit the website of the National Oesophago-Gastric Cancer Audit. https://www.nogca.org.uk