Development of a core outcome set for lateral elbow tendinopathy (COS-LET) using best available evidence and an international consensus process.

"the responses were analysed and those instruments achieving <30% of votes were excluded 10 1136/bjsports-2021-105044 supp1 supplementary data 10 1136/bjsports-2021-105044 supp2 supplementary data patient focus groups: results of the delphi stages inclusive of survey 2 were then discussed at an online patient focus group for uk patients and another for australian patients."

"Competing interests: MB and JPE contributed equally and share first authorship. MB, JPE, AW, JP, VJ, VV, LMB and BV declare that they have no competing interests. The core outcome set for lateral elbow tendinopathy (COS-LET) consensus group has no competing interests except for Joy MacDermid, who is the author of the Patient Rated Tennis Elbow Evaluation (PRTEE). Her responses were removed from survey and consensus voting related to the use of the PRTEE in the COS-LET."

"Funding: This work is not funded and relies on the individuals involved donating their time. Open access publication fees were funded by the University Hospitals of Derby and Burton NHS Foundation Trust Charity."

"We registered the project with the Core Outcome Measures in Effectiveness Trials Initiative (http://www.comet-initiative.org/Studies/Details/1497) and published the protocol in an open access journal. (https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-021-05291-9). This report follows the COS Standards for Reporting checklist. "