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

The COS-LET comprises the PRTEE for the disability domain. Interim-use recommendations included PRTEE subscales, time off work, pain-free grip strength and a Numerical Rating Scale measuring pain on gripping. Further work is required to validate these interim measures and develop suitable measures to capture the other domains.