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Article History

Received: 23 May 2018

Accepted: 20 September 2018

First Online: 2 October 2018

Ethics approval and consent to participate

: The data used for this study were obtained from the anonymised NHS PROMs programme, covered by consent from the NHS [CitationRef removed]. As such, no further institutional research ethics approvals were required. NHS PROMs data are furthermore released under the UK Open Government Licence v3.0 [CitationRef removed]. The anonymised NHS PROMs data are covered by consent which specifies that it can be used by academics to inform research on PROM eligible procedures such as KR [CitationRef removed].

: Not applicable.

: All authors have completed the ICMJE uniform disclosure form. RGH and VW are members of the journal’s editorial board, but as all other authors they have no other financial or personal relationships with other people or organisations that could inappropriately bias this work. AJ declares financial activities with Anthera Pharmaceuticals (through the Data Safety and Monitoring Board), the UK Renal Registry, Freshfields Brukhaus Deringer, and Roche, all outside the submitted work. RPV declares financial activities with Freshfields Brukhaus Deringer and Mereo Biopharma, both outside the submitted work as well.

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