Funding for this research was provided by:
British Heart Foundation (R1680901)
Text and Data Mining valid from 2018-12-01
Received: 10 May 2018
Accepted: 3 December 2018
First Online: 10 December 2018
Ethics approval and consent to participate
: The NACR is hosted by NHS Digital, NACR is allowed to use anonymised patient level data and the agreements are annually assessed as a part of data governance approval between NHS digital and NACR. These agreements and anonymity of the data set meant that there was no need for separate ethical approval. Permission is granted for the NACR to use patients’ data by the NHS digital and Health Research Authority’s Confidentiality Group under section 251 of the NHS Act 2006, which allows to collect identifiable patient data for NHS digital without needing individual consent.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.